Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1970_6_3_a19, author = {V. N. Laptinskii}, title = {Parametric functions of several matrices and of a countable set of matrices}, journal = {Differencialʹnye uravneni\^a}, pages = {558--560}, publisher = {mathdoc}, volume = {6}, number = {3}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1970_6_3_a19/} }
V. N. Laptinskii. Parametric functions of several matrices and of a countable set of matrices. Differencialʹnye uravneniâ, Tome 6 (1970) no. 3, pp. 558-560. http://geodesic.mathdoc.fr/item/DE_1970_6_3_a19/