Oscillation of solutions of a non-linear delay differential equation of the fourth order
On the existence and boundedness of solutions of a nonlinear delay differential system
On boundedness and stability of solutions of nonlinear second order differential equations in Hilbert spaces
On the existence of solutions of the -th order non-linear differential equation with delay
On zero points of solutions of the -th order non-linear delay differential equation
Asymptotic formulas for solutions of functional-differential equations
Über die Beschränktheit und die Existenz von Lösungen der Differentialgleichung 4. Ordnung mit nacheilendem Argument
On the existence of solutions of operator-differential equations
On the asymptotic behaviour of the solutions of nonlinear delay differential system
Asymptotic and integral equivalence of multivalued differential systems
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