Bounded and L 2 -solutions to a second order nonlinear differential equation with a square integrable forcing term. Kroopnick, Allan — 1999 International Journal of Mathematics and Mathematical Sciences
General boundedness theorems to some second order nonlinear differential equation with integrable forcing term. Kroopnick, Allan — 1995 International Journal of Mathematics and Mathematical Sciences
Properties of solutions to a generalized Liénard equation with forcing term. Kroopnick, Allan — 2008 Applied Mathematics E-Notes [electronic only]
On the boundedness and oscillation of solutions to ( m ( t ) x 1 ) 1 + a ( t ) b ( x ) = 0 . Kroopnick, Allan J. — 1987 International Journal of Mathematics and Mathematical Sciences
Properties of solutions to a second order nonlinear differential equation. Kroopnick, Allan J. — 1990 International Journal of Mathematics and Mathematical Sciences