@article{DAN_1972_202_4_a5,
     author = {D. V. Ranchin},
     title = {Compactness modulo an ideal},
     journal = {Doklady Akademii Nauk},
     pages = {761--764},
     publisher = {mathdoc},
     volume = {202},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_202_4_a5/}
}