@article{Smits1998,
author = {Smits, L.J. and Zielhuis, G.A. and Jongbloet, P.H. and Straatman, H.},
title= {Seasonal variation in human fecundability},
year = {1998},
doi = {10.1093/humrep/13.12.3520},
volume = {13},
number = {12},
pages = {3520--3524},
}