@article{Hammel2005,
author = {Hammel, E. A.},
title= {Chayanov revisited: A model for the economics of complex kin units},
year = {2005},
doi = {10.1073/pnas.0501987102},
journal = {PNAS--Proceedings of the National Academy of Sciences of the United States of America},
volume = {102},
number = {19},
pages = {7043--7046},
}