@article{Pennycuick1969,
author = {Pennycuick, L.},
title= {A computer model of the Oxford Great Tit population},
year = {1969},
doi = {10.1016/0022-5193(69)90011-3},
journal = {Journal of Theoretical Biology},
volume = {22},
number = {3},
pages = {381--400},
}