Generalized Variational Principles on Oscillation for Nonlinear Nonhomogeneous Differential Equations

Shao, J., Meng, F. W., & Pang, X. Q. (2012). Generalized Variational Oscillation Principles for Second-Order Differential Equations with Mixed-Nonlinearities. Discrete Dynamics in Nature and Society, 2012(), 519-528-135. https://doi.org/10.1155/2012/539213
Graef, J. R., Grammatikopoulos, M. K., Kitamura, Y., Takasikusano, Onose, H., & Spikes, P. W. (1984). NONOSCILLATION THEOREMS FOR FUNCTIONAL DIFFERENTIAL EQUATIONS OF ARBITRARY ORDER. International Journal of Mathematics and Mathematical Sciences, 1984(), 249-256. https://doi.org/10.1155/S0161171284000259
Merzagui, N. D., & Boucherif, A. (2013). Variational Approach to Impulsive Differential Equations with Singular Nonlinearities. Journal of Applied Mathematics, 2013(), 638-644-362. https://doi.org/10.1155/2013/464393
Li, T. X., & Rogovchenko, Y. V. (2014). Oscillatory Behavior of Second-Order Nonlinear Neutral Differential Equations. Abstract and Applied Analysis, 2014(), 754-761. https://doi.org/10.1155/2014/143614
Unlu, C., Jafari, H., & Baleanu, D. (2013). Revised Variational Iteration Method for Solving Systems of Nonlinear Fractional-Order Differential Equations. Abstract and Applied Analysis, 2013(), 280-286-532. https://doi.org/10.1155/2013/461837