共 14 条
[2]
Hausdorff F., 1962, SET THEORY, V2nd
[3]
Hohle U., 1978, Fuzzy Sets and Systems, V1, P311, DOI 10.1016/0165-0114(78)90021-0
[6]
KALEVA O, 1980, FUZZY METRIC SPACES
[7]
Kuratowski C, 1958, TOPOLOGIE
[9]
LOWEN R, 1974, CR ACAD SCI A MATH, V278, P925
[10]
Negoita C. V., 1975, ISR, V11