TY - JOUR AU - S. A. Mazanik TI - Lappo-Danilevski{\v\i} systems in the set of linear systems JO - Differencialʹnye uravneniâ PY - 1999 SP - 90 EP - 96 VL - 35 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1999_35_1_a13/ LA - ru ID - DE_1999_35_1_a13 ER -