TY  - JOUR
A1  - Bongaarts, J.
A1  - Feeney, G.
T1  - Estimating mean lifetime
Y1  - 2003
DO  - 10.1073/pnas.2035060100
JF  - Proceedings of the National Academy of Sciences
VL  - 100
IS  - 23
SP  - 13127
EP  - -13133

ER  -