@article{Greenwood1914,
author = {Greenwood, M. and Yule, G. U.},
title= {On the determination of size of family and of the distribution of characters in order of birth from samples taken through members of the sibships},
year = {1914},
doi = {10.2307/2339801},
volume = {77},
number = {2},
pages = {179--199},
}