共 3 条
[1]
BOOLOS G., 1974, COMPUTABILITY LOGIC, Vfifth
[2]
FRIEDMAN H, 1975, J SYMBOLIC LOGIC, V40, P113, DOI 10.2307/2271891
[3]
Lob M., 1955, J SYMBOLIC LOGIC, V20, P115, DOI [DOI 10.2307/2266895, 10.2307/2266895]