@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 = {Proceeds of the National Academies of Science of the United States of America},
volume = {102},
pages = {7043--7046},
}