Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1983_19_11_a24, author = {S. N. Markov}, title = {Singularities of solutions of second-order systems in a real domain}, journal = {Differencialʹnye uravneni\^a}, pages = {1993--1995}, publisher = {mathdoc}, volume = {19}, number = {11}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1983_19_11_a24/} }
S. N. Markov. Singularities of solutions of second-order systems in a real domain. Differencialʹnye uravneniâ, Tome 19 (1983) no. 11, pp. 1993-1995. http://geodesic.mathdoc.fr/item/DE_1983_19_11_a24/