TY - JOUR AU - A. S. Apartsyn AU - I. V. Sidler TI - The test Volterra equation of the first kind in integral models of developing systems containing $n$ age groups JO - Vestnik rossijskih universitetov. Matematika PY - 2018 SP - 168 EP - 179 VL - 23 IS - 122 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VTAMU_2018_23_122_a7/ LA - ru ID - VTAMU_2018_23_122_a7 ER -