Oscillatory criteria of nonlinear hyperbolic equations with continuous deviating arguments.

Wang Peiguang Oscillatory criteria of nonlinear hyperbolic equations with continuous deviating arguments. 163-169 1999 106 Applied Mathematics and Computation 2-3 http://dx.doi.org/10.1016/S0096-3003(98)10110-8 db/journals/amc/amc106.html#Peiguang99