@article{Zullinger1984,
author = {Zullinger, E.M. and Ricklefs, R.E. and Redford, K.H. and Mace, G.M.},
title= {Fitting sigmoidal equations to mammalian growth rates},
year = {1984},
doi = {10.2307/1380844},
journal = {Journal of Mammalogy},
volume = {65},
number = {4},
pages = {607--636},
}