@article{DE_1976_12_9_a2,
     author = {\`E. I. Grudo and L. F. Yanchuk},
     title = {Limit points of the solutions of completely integrable autonomous {Pfaffian} systems in the neighborhood of a stationary point},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1552--1556},
     publisher = {mathdoc},
     volume = {12},
     number = {9},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_9_a2/}
}