TY  - JOUR
A1  - Emlen, S.T.
T1  - An evolutionary theory of the family
Y1  - 1995
DO  - 10.1073/pnas.92.18.8092
JF  - Proceedings of the National Academy of Sciences
VL  - 92
IS  - 18
SP  - 8092
EP  - -8099

ER  -