@article{DE_1973_9_9_a2,
     author = {\`E. I. Grudo},
     title = {Movable singular points of a completely integrable first order total differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1572--1582},
     publisher = {mathdoc},
     volume = {9},
     number = {9},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_9_a2/}
}