@article{DE_1982_18_3_a2,
     author = {\`E. I. Grudo},
     title = {The analytic structure of solutions of nonlinear {Pfaffian} systems with bounded coefficients in transcendental cases},
     journal = {Differencialʹnye uravneni\^a},
     pages = {397--409},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_3_a2/}
}