PageHeader : Funkcialaj Ekvacioj, 22 (1979) 143-159 Title : Nonlinear Wave Equations with Variable Coefficients AuthorInfo : By AuthorInfo : Yukiyoshi EBIHARA AuthorInfo : (Fukuoka University, Japan) section : 0. Introduction section : 1. Notations and propositions section : 2. Equations with small coefficients section : 3. Nonlinear telegraph equations section : 4. Applications section : References