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@article{newN,
	AUTHOR = {Afrouzi, G. A. and Shokooh, S.},
	TITLE = {Existence of infinitely many solutions for quasilinear problems with a p(x)-biharmonic operator},
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	VOLUME = {2015},
	NUMBER = {317},
	YEAR = {2015},
	PAGES = {1--14}}

@article{new4,
author = {Afrouzi, G. A. and Mirzapour, Mahmood and Chung, Nguyen},
title = {Existence and Multiplicity of Solutions for {K}irchhoff Type Problems Involving p(x)-Biharmonic Operators},
journal = {Zeitschrift für Analysis und ihre Anwendungen (Journal of analysis and its applications)},
volume = {33},
year = {2014},
month = {01},
pages = {289--303},
doi = {10.4171/ZAA/1512}
}
	
@article{new40,
	AUTHOR = {Amrouss, A. R. E. and Ourraoui, A.},
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	VOLUME = {31},
	YEAR = {2013},
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@article{new5,
	AUTHOR = {Baraket, S. and R\v{a}dulescu, V.},
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	JOURNAL = {Adv. Nonlinear Stud.},
	VOLUME = {2016},
	YEAR = {2016},
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@article{new4444,
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	VOLUME = {72},
	YEAR = {2016},
	PAGES = {2505--2515}}	

@article{new32,
	AUTHOR = {Candito, P. and Bisci, M.},
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	VOLUME = {5},
	YEAR = {2012},
	PAGES = {741--751}}	

@article{new6,
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	TITLE = {Multiple perturbations of a singular eigenvalue problem},
	JOURNAL = {Nonlinear Anal.},
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	YEAR = {2015},
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@book{new39,
	AUTHOR = {Costa, D. G.},
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	PUBLISHER = {Birkh\"{a}user},
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@article{new7,
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	JOURNAL = {Adv. Nonlinear Anal.},
	VOLUME = {4},
	YEAR = {2015},
	PAGES = {135--151}}	

@article{new25,
	AUTHOR = {Deng, S. G.},
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	JOURNAL = {Appl. Math. Comput.},
	VOLUME = {211},
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@phdthesis{new2,
	AUTHOR = {Diening, L.},
	TITLE = {Theoretical and numerical results for electrorheological fluids},
	SCHOOL = {University of Frieburg},
	ADDRESS = {Germany},
	YEAR = {2002}}			

@article{new28,
	AUTHOR = {Diening, L.},
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@book {new30,
	AUTHOR = {Diening, L. and Harjulehto, P. and H\"{a}st\"{o}, P. and R\r{u}\v{z}i\v{c}ka, M.},
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	SERIES = {Lecture Notes in Math.},
	VOLUME = {2017},
	PUBLISHER = {Springer-Verlag},
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	YEAR = {2011}}

@article{new35,
	AUTHOR = {Fan, X. L. and Deng, S. G.},
	TITLE = {Remarks on {R}icceri's variational principle and applications to the p(x)-{L}aplacian equations},
	JOURNAL = {Nonlinear Anal.},
	VOLUME = {67},
	YEAR = {2007},
	PAGES = {3064--3075}}	

@article {new29,
    AUTHOR = {Fan, Xianling and Zhao, Dun},
    TITLE = {On the spaces $L^{p(x)}(\Omega)$ and $W^{m,p(x)}(\Omega)$},
    JOURNAL = {J. Math. Anal. Appl.},
    FJOURNAL = {Journal of Mathematical Analysis and Applications},
    VOLUME = {263},
    YEAR = {2001},
    NUMBER = {2},
    PAGES = {424--446},
    ISSN = {0022-247X},
    MRCLASS = {46E35 (46E30)},
    MRNUMBER = {1866056},
    MRREVIEWER = {Anna Mercaldo},
    DOI = {10.1006/jmaa.2000.7617},
    URL = {https://doi.org/10.1006/jmaa.2000.7617},
}

@article{new35a,
	AUTHOR = {Fan, X. L. and Han, X. Y.},
	TITLE = {Existence and multiplicity of solutions for p(x)-{L}aplacian equations in $\mathbb{R}^N$},
	JOURNAL = {Nonlinear Anal.},
	VOLUME = {59},
	YEAR = {2004},
	PAGES = {173--188}}	
	
		
@book {GK,
	AUTHOR = {Graef, J. R. and Kong, L.},
	TITLE = {Multiple Solutions of Boundary Value Problems, A Variational Approach},
	SERIES = {Trends in Abstract and Applied Analysis},
	VOLUME = {1},
	PUBLISHER = {World Scientific},
	ADDRESS = {Singapore},
	YEAR = {2015}}	
	
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@article{new8,
	AUTHOR = {Heidarkhani, S.},
	TITLE = {Non-trivial solutions for a class of (p1; : : : ; pn)-biharmonic systems with {N}avier boundary conditions},
	JOURNAL = {Ann. Polon. Math.},
	VOLUME = {105},
	YEAR = {2012},
	PAGES = {65--76}}

@article{new88,  
	AUTHOR = {Heidarkhani, S. and Afrouzi, G. A. and Ferrara, M. and Moradi, S.},
	TITLE = {Variational approaches to impulsive elastic beam equations of {K}irchhoff type},
	JOURNAL = {Complex Var. Elliptic Equ.},
	VOLUME = {61},
	YEAR = {2016},
	PAGES = {931--968}}

@article{new9000,  
	AUTHOR = {Heidarkhani, S. and Afrouzi, G. A. and Moradi, S. and Caristi, G. and Ge, B.},
	TITLE = {A variational approach for solving p(x)-biharmonic equations with {N}avier boundary conditions},
	JOURNAL = {Electron. J. Differential Equations},
	VOLUME = {2017},
	NUMBER = {25},
	YEAR = {2017},
	PAGES = {1--15}}

@article{new9,  
	AUTHOR = {Heidarkhani, S. and Afrouzi, G. A. and Moradi, S. and Caristi, G. and Ge, B.},
	TITLE = {Existence of one weak solution for p(x)-Biharmonic equations with {N}avier boundary conditions},
	JOURNAL = {Z. Angew. Math. Phys.},
	VOLUME = {67},
	NUMBER = {73},
	YEAR = {2016},
	PAGES = {1--13}}

@article{new10,  
	AUTHOR = {Heidarkhani, S. and Ferrara, M. and Salari, A. and Caristi, G.},
	TITLE = {Multiplicity results for p(x)-biharmonic equations with {N}avier boundary},
	JOURNAL = {Complex Var. Elliptic Equ.},
	VOLUME = {61},
	YEAR = {2016},
	PAGES = {1494--1516}}

@article{new11,  
	AUTHOR = {Heidarkhani, S. and Tian, Y. and Tang, C.-L.},
	TITLE = {Existence of three solutions for a class of (p1; : : : ; pn)-biharmonic systems with {N}avier boundary conditions},
	JOURNAL = {Ann. Polon. Math.},
	VOLUME = {104},
	YEAR = {2012},
	PAGES = {261--277}}

@article{new33,  
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@article{new12,  
	AUTHOR = {Kong, L.},
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	VOLUME = {143},
	YEAR = {2015},
	PAGES = {249--258}}

@article{new13,  
	AUTHOR = {Kong, L.},
	TITLE = {Multiple solutions for fourth order elliptic problems with p(x)-biharmonic operators},
	JOURNAL = {Opuscula Math.},
	VOLUME = {36},
	YEAR = {2016},
	PAGES = {253--264}}

@article{new14,  
	AUTHOR = {Li, L. and Tang, C.-L.},
	TITLE = {Existence of three solutions for (p; q)-biharmonic systems},
	JOURNAL = {Nonlinear Anal.},
	VOLUME = {73},
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@article{new15,  
	AUTHOR = {Li, C. and Tang, C.-L.},
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@article{new31,  
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@article{new16,  
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@article{new17,  
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@article{new22,  
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@book {new21,
	AUTHOR = {R\r{u}\v{z}i\v{c}ka, M.},
	TITLE = {Electro-rheological fluids: modeling and mathematical theory},
	SERIES = {Lecture Notes in Math.},
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@article{new18,  
	AUTHOR = {Yin, H. and Liu, Y.},
	TITLE = {Existence of three solutions for a {N}avier boundary value problem involving the p(x)-biharmonic},
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@article{new19,  
	AUTHOR = {Yin, H. and Xu, M.},
	TITLE = {Existence of three solutions for a {N}avier boundary value problem involving the p(x)-biharmonic operator},
	JOURNAL = {Ann. Polon. Math.},
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	YEAR = {2013},
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@article{new20,  
	AUTHOR = {\"{Y}uceda\v{g}, Z.},
	TITLE = {Solutions of nonlinear problems involving p(x)-{L}aplacian operator},
	JOURNAL = {Adv. Nonlinear Anal.},
	VOLUME = {4},
	YEAR = {2015},
	PAGES = {285--293}}
		
@article{new34,  
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