TY  - RPRT
TI  - Estimating survival functions from the life table.
AU  - E A Gehan
PY  - 1969
DO  - 10.1016/0021-9681(69)90035-6
UR  - https://pubmed.ncbi.nlm.nih.gov/5770430/
ID  - 5770430
ER  -