@article{ZVMMF_1990_30_7_a12,
     author = {M. F. Kaspshitskaya and I. V. Sergienko and A. I. Stiranka},
     title = {Some properties of discrete fuzzy sets},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1107--1112},
     year = {1990},
     volume = {30},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1990_30_7_a12/}
}