Comparison and oscillation theorems for second order differential equations
Comparison theorems for deviated differential equations with property .
Comparison theorems for differential equations with deviating argument
Comparison theorems for second-order neutral differential equations of mixed type.
Comparison theorems for the third-order delay trinomial differential equations.
Conditions for oscillation of a neutral differential equation.
Conditions for the absence of positive solutions of a first order differential inequality with a single delay
A sufficient integral condition for the absence of eventually positive solutions of a first order stable type differential inequality with one nondecreasing retarded argument is given. In the special case of equality the result becomes an oscillation criterion.
Criteria for oscillation of solutions of two-dimensional differential systems with deviating arguments.