@article{DAN_1971_196_5_a1,
     author = {I. Gohberg and E. M. Shpigel},
     title = {A projection method for solving singular integral equations},
     journal = {Doklady Akademii Nauk},
     pages = {1002--1005},
     year = {1971},
     volume = {196},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_196_5_a1/}
}