共 6 条
[1]
CORNFIELD J, 1951, J NATL CANCER I, V11, P1269
[2]
Feller W., 1957, An introduction to probability theory and its applications
[3]
SAMPLE SIZES FOR MEDICAL TRIALS WITH SPECIAL REFERENCE TO LONG-TERM THERAPY
[J].
JOURNAL OF CHRONIC DISEASES,
1968, 21 (01)
:13-&
[4]
MacMahon B, 1970, Epidemiology: Principles and Methods