Multiplicity result for a discrete eigenvalue problem with discontinuous nonlinearities

Variational methods for non-differentiable functionals and their applications to partial differential equations

Kung-Ching Chang · Journal of Mathematical Analysis and Applications · 1981 · 874 citations

Natural Sciences, Mathematics, Differential Equations +13

On a three critical points theorem

Biagio Ricceri · Archiv der Mathematik · 2000 · 311 citations

Natural Sciences, History, Critical Theory +6

Multiple positive solutions of singular and nonsingular discrete problems via variational methods

Ravi P. Agarwal, Kanishka Perera, Donal O’Regan · Nonlinear Analysis · 2004 · 196 citations

Natural Sciences, Mathematics, Computational Mechanics +14

On a three critical points theorem for non-differentiable functions and applications to nonlinear boundary value problems

S. Marano, Dumitru Motreanu · Nonlinear Analysis · 2002 · 136 citations

Natural Sciences, Mathematics, Differential Equations +13

Existence of three solutions for a two point boundary value problem

G. Bonannao · Applied Mathematics Letters · 2000 · 87 citations

Natural Sciences, Aerospace Engineering, Differential Equations +9