共 4 条
[1]
ANGELL RB, 1961, J SYMBOLIC LOGIC, V27, P327
[2]
BURKS A, 1951, MIND, V60, P363
[3]
Lewis D., 1973, COUNTERFACTUALS
[4]
Stalnaker R., 1968, STUDIES LOGICAL THEO, P98, DOI DOI 10.1007/978-94-009-9117-0_2