@article{DAN_1974_217_2_a8,
     author = {V. S. Pilidi and L. I. Sazonov},
     title = {A priori estimates for characteristic bisingular integral operators},
     journal = {Doklady Akademii Nauk},
     pages = {285--287},
     publisher = {mathdoc},
     volume = {217},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_217_2_a8/}
}