@article{DAN_1991_316_5_a10,
     author = {A. G. Perevozchikov},
     title = {Regularization of kernels of binary relations defined by},
     journal = {Doklady Akademii Nauk},
     pages = {1068--1071},
     publisher = {mathdoc},
     volume = {316},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_316_5_a10/}
}