Davis H.T. Introduction to Nonlinear Differential and Integral Equations

Dover, 1962. — 592 pages.Topics covered include differential equations of the 1st order, the Riccati equation and existence theorems, 2nd order equations, elliptic integrals and functions, the technique of continuous analysical continuation, the phenomena of the phase plane, nonlinear mechanics, nonlinear integral equations, problems from the calculus of variations and more. Includes 137 problems.