Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1997_352_1_a6, author = {V. V. Filippov}, title = {On the acyclicity of solution sets of ordinary differential}, journal = {Doklady Akademii Nauk}, pages = {28--31}, publisher = {mathdoc}, volume = {352}, number = {1}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1997_352_1_a6/} }
V. V. Filippov. On the acyclicity of solution sets of ordinary differential. Doklady Akademii Nauk, Tome 352 (1997) no. 1, pp. 28-31. http://geodesic.mathdoc.fr/item/DAN_1997_352_1_a6/