TY - JOUR AU - A. Azamov TI - The measure of nonregularity of quasitriangular systems JO - Differencialʹnye uravneniâ PY - 1975 SP - 1497 EP - 1500 VL - 11 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1975_11_8_a14/ LA - ru ID - DE_1975_11_8_a14 ER -