@article{DAN_1971_197_1_a9,
     author = {N. I. Naumova},
     title = {The core in a game with a countable number of players},
     journal = {Doklady Akademii Nauk},
     pages = {40--42},
     publisher = {mathdoc},
     volume = {197},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_197_1_a9/}
}