TY - JOUR AU - I. N. Sergeev TI - Oscillation and wandering of solutions to a second order differential equation JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2011 SP - 21 EP - 26 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2011_6_a4/ LA - ru ID - VMUMM_2011_6_a4 ER -