TY - JOUR AU - V. N. Laptinskii AU - V. V. Pugin TI - Certain special transformations of matrix differential equations of Riccati type JO - Differencialʹnye uravneniâ PY - 1972 SP - 1511 EP - 1514 VL - 8 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_8_a24/ LA - ru ID - DE_1972_8_8_a24 ER -