@article{Gibson2011,
author = {Gibson, M.A. and Gurmu, E.},
title= {Land inheritance establishes sibling competition for marriage and reproduction in rural Ethiopia},
year = {2011},
doi = {10.1073/pnas.1010241108},
journal = {Proceedings of the National Academy of Sciences},
volume = {108},
number = {6},
pages = {2200--2204},
}