@article{DE_1975_11_3_a15,
     author = {I. V. Boykov and I. I. Zhechev},
     title = {On the approximate solution of singular integrodifferential equations. {II.~Nonlinear} equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {562--571},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_3_a15/}
}