@article{01814790, title = {Conditions for convergence of the fundamental matrix of linear time-invariant time-delayed singular systems.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {30}, year = {2002}, pages = {463-475}, doi = {10.1155/S016117120201178X}, zbl = {1018.93017}, language = {en}, url = {http://dml.mathdoc.fr/item/01814790} }
Saric, Branko. Conditions for convergence of the fundamental matrix of linear time-invariant time-delayed singular systems.. International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 463-475. doi : 10.1155/S016117120201178X. http://gdmltest.u-ga.fr/item/01814790/