Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_2008_83_5_a17, author = {N. I. Shkil' and G. V. Zavizion}, title = {System of {Linear} {Differential} {Equations} with {Degeneracy} at a {Point}}, journal = {Matemati\v{c}eskie zametki}, pages = {796--800}, publisher = {mathdoc}, volume = {83}, number = {5}, year = {2008}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2008_83_5_a17/} }
N. I. Shkil'; G. V. Zavizion. System of Linear Differential Equations with Degeneracy at a Point. Matematičeskie zametki, Tome 83 (2008) no. 5, pp. 796-800. http://geodesic.mathdoc.fr/item/MZM_2008_83_5_a17/