PageHeader : Funkcialaj Ekvacioj, 41 (1998) 79-89 Title : New Approach of Studying the Oscillation Title : of Neuffal Differential Equations* AuthorInfo : By AuthorInfo : B. G. ZHANG and Bo YANG AuthorInfo : (Ocean University of Qingdao, P.R. China) section : 1. Introduction section : 2. Sufficient condition of oscillation of Eq(l.l) section : 3. Sufficient and necessary conditions for (1.1) to oscillate in the case c $=1$ section : References