共 4 条
[2]
Church Alonzo, 1943, J SYMBOLIC LOGIC, V8, P50, DOI [10.2307/2268006, DOI 10.2307/2268006]
[3]
Post E.L., 1944, B AM MATH SOC, V50, P284, DOI [DOI 10.1090/S0002-9904-1944-08111-1, 10.1090/S0002-9904-1944-08111-1]