TY - JOUR AU - Yu. S. Kolesov TI - Properties of solutions of a~class of equations with lag which describe the dynamics of change in the population of a~species with the age structure taken into account JO - Sbornik. Mathematics PY - 1983 SP - 91 EP - 100 VL - 45 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1983_45_1_a5/ LA - en ID - SM_1983_45_1_a5 ER -