共 19 条
[1]
BAGBY R, TO BE PUBLISHED
[4]
BURENKOV VI, 1968, PROGR MATH, V2
[7]
Hempel JA., 1970, B AUST MATH SOC, V3, P369, DOI 10.1017/S0004972700046074
[9]
Hunt RA., 1966, ENSEIGN MATH, V2, P249
[10]
Il'in, 1954, DOKL AKAD NAUK SSSR, V96, P905