Differential Equations & Applications · Volume 10, Issue 2 Lower bounds for the first zero for nonlinear second order differential equations 10-13 Pages 209-218 DOI 10.7153/dea-2018-10-13 Downloads Short PDF Full PDF PNG Authors Daniel C. Biles Keywords second order differential equations nonlinear differential equations estimation of a zero Subject classes 34C10 34A34 34A36