@article{DAN_1990_314_5_a6,
     author = {G. Dzhangibekov},
     title = {A class of two-dimensional singular integral operators},
     journal = {Doklady Akademii Nauk},
     pages = {1055--1059},
     year = {1990},
     volume = {314},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_5_a6/}
}