Karpuz Basak: Oscillation and stability of first-order delay differential equations with retarded impulses. (2015)
Dix Julio G. and Karpuz Basak and Rath Radhanath: Necessary and sufficient conditions for the oscillation of differential equations involving distributed argument. (2011)
Karpuz Basak: Unbounded oscillation of higher-order nonlinear delay dynamic equations of neutral type with oscillating coefficients. (2009)