共 35 条
[31]
STILLWELL JCH, 1975, WP100 U LEEDS SCH GE
[32]
STILLWELL JCH, 1977, WP199 U LEEDS SCH GE
[33]
STONE R, 1970, MATH MODELS EC OTHER
[35]
Willekens F. J., 1981, ADV MULTIREGIONAL DE, P83