The period function of a delay differential equation and an application. - Ábel Garab; Tibor Krisztin (Period. Math. Hung., 2011)

A sharp oscillation criterion for a linear delay differential equation. - Ábel Garab; Mihály Pituk; Ioannis P. Stavroulakis (Appl. Math. Lett., 2019)

A Sharp Oscillation Criterion for a Linear Differential Equation with Variable Delay. - Ábel Garab (Symmetry, 2019)

Oscillation criteria for first order linear delay differential equations with several variable delays. - Ábel Garab; Ioannis P. Stavroulakis (Appl. Math. Lett., 2020)

Convergence in nonautonomous linear differential equations with Kirchhoff coefficients. - Ábel Garab; Mihály Pituk (Syst. Control. Lett., 2021)