@article{Hawkes1997,
author = {Hawkes, K. and O’Connell, J.F. and Blurton Jones, N.G.},
title= {Hadza Women’s Time Allocation, Offspring Provisioning, and the Evolution of Long Postmenopausal Life Spans},
year = {1997},
doi = {10.1086/204646},
journal = {Current Anthropology},
volume = {38},
number = {4},
pages = {551--577},
}