Bruno, Alexander D. Local methods in nonlinear differential equations / Alexander D. Bruno ; translated from the Russian by William Hovingh and Courtney S. Coleman. - Berlin : Springer-Verlag, 1989. - 2 v. ; 24 cm. Translation of: Lokal'mji method nelineinogo analiza differentsial'nykh uravnenii 2 volumes in 1 ISBN: 0387189262 Subjects--Topical Terms: Differential equations, Nonlinear.