Differential equations with several deviating arguments: Sturmian comparison method in oscillation theory. II. Berezansky, Leonid; Domshlak, Yury — 2002 Electronic Journal of Differential Equations (EJDE) [electronic only]
First-order differential equations with several deviating arguments: Sturmian comparison method in oscillation theroy: I. Berezansky, Leonid; Domshlak, Yury — 2001 Electronic Journal of Differential Equations (EJDE) [electronic only]
Damped second order linear differential equation with deviating arguments: sharp results in oscillation properties. Berezansky, Leonid; Domshlak, Yury — 2004 Electronic Journal of Differential Equations (EJDE) [electronic only]