Fucik S., Kufner A. Nonlinear Differential Equations

Elsevier Science, 1980. — 360 p.This book owes its origins to our friend and respected colleague Prof. Dr. Karel Rektorys, DrSc. His book "Variational Methods in Mathematics, Science and Engineering" represents a highly successful attempt of presenting to a broad range of readers a textbook devoted to modern methods of solution of boundary value problems in linear partial differential equations; a textbook based upon deep results of functional analysis and yet intended not only for mathematicians but also (indeed principally) for engineers.