@article{Hammel2005a,
author = {Hammel, E.A.},
title= {Chayanov revisited: A model for the economics of complex kin units},
year = {2005a},
doi = {10.1073/pnas.0501987102},
journal = {Proceedings of The National Academy of Sciences, USA},
volume = {102},
number = {19},
pages = {7043--7046},
}