@article{ARM_1987__23_4_a4,
     author = {Do\v{s}l\'y, Ond\v{r}ej},
     title = {Riccati matrix differential equation and classification of disconjugate differential systems},
     journal = {Archivum mathematicum},
     pages = {231--241},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1987},
     mrnumber = {930783},
     zbl = {0637.34025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1987__23_4_a4/}
}