@inbook{Becker1991,
author = {Becker, S.},
title= {Seasonal patterns of births and conception throughout the world},
year = {1991},
doi = {10.1007/978-1-4684-5913-5_6},
editor = {Zorgniotti, A.W.},
booktitle = {Temperature and environmental effects on the testis},
address = {Boston},
publisher = {Springer},
pages = {59--72},
}