1. Oscillation and nonoscillation of neutral differential equations with positive and negative coefficients Creator: Luo, Zhiguo and Shen, Jian Hua Format: bez média and svazek Type: model:article and TEXT Subject: oscillation;, neutral differential equations, and positive and negative coefficients Language: English Description: In this paper, oscillattion and nonoscillation criteria are established for neutral differential equations with positive and negative coefficients. Our criteria improve and extend many results known in the literature. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public