@article{DE_2005_41_10_a20,
     author = {N. V. Spichekova},
     title = {On the {Behavior} of {Integral} {Surfaces} of a {Pfaff} {Equation} with a {Nonclosed} {Singular} {Curve}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1429--1432},
     publisher = {mathdoc},
     volume = {41},
     number = {10},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_10_a20/}
}