TY - JOUR AU - Julka Knežević-Miljanović AU - Ljubica Lalović TI - Investigation of stability on nonlinear oscilations with one degree of freedom JO - Kragujevac Journal of Mathematics PY - 2003 SP - 91 VL - 25 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KJM_2003_25_a8/ LA - en ID - KJM_2003_25_a8 ER -