Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{KYB_1991__27_4_a1, author = {Nieuwenhuis, J. W. and Willems, Jan C.}, title = {On the nature of descriptor systems}, journal = {Kybernetika}, pages = {282--288}, publisher = {mathdoc}, volume = {27}, number = {4}, year = {1991}, mrnumber = {1127905}, zbl = {0767.93061}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KYB_1991__27_4_a1/} }
Nieuwenhuis, J. W.; Willems, Jan C. On the nature of descriptor systems. Kybernetika, Tome 27 (1991) no. 4, pp. 282-288. http://geodesic.mathdoc.fr/item/KYB_1991__27_4_a1/