%0 Journal Article %A Došlý, Ondřej %T Riccati matrix differential equation and classification of disconjugate differential systems %J Archivum mathematicum %D 1987 %P 231-241 %V 23 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1987__23_4_a4/ %G en %F ARM_1987__23_4_a4