TY - JOUR TI - Sergey Aleksandrovich Samal' JO - Journal of the Belarusian State University. Mathematics and Informatics PY - 2018 SP - 109 EP - 110 VL - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/BGUMI_2018_1_a13/ LA - ru ID - BGUMI_2018_1_a13 ER -