@article{DE_1973_9_10_a12,
     author = {O. A. Liskovets},
     title = {Method of $\varepsilon $-quasisolutions for equations of the first kind},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1851--1861},
     publisher = {mathdoc},
     volume = {9},
     number = {10},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_10_a12/}
}