1. On oscillatory and asymptotic solutions of the first order differential equation with deviating arguments;Koplatadge;Differential'nye Uravnenija,1982
2. Sharp conditions for oscillations caused by delays;Ladas;Applicable Analysis,1979
3. Oscillations of higher-order retarded differential equations generated by the retarded argument;Ladas,1972
4. Oscillations caused by several retarded and advanced arguments;Ladas;J. diff. Eqns,1982
5. On delay differential inequalities of first order;Ladas;Funkcialaj Ekvacioj,1982