TY  - JOUR
A1  - T.V., Pollet
A1  - Nettle, D.
A1  - Nelissen, M.
T1  - Maternal grandmothers do go the extra mile: factoring distance and lineage into differential contact with grandchildren
Y1  - 2007
JF  - Evolutionary Psychology 
VL  - 5
IS  - 4

ER  -