@article{Matsuda1994,
author = {Matsuda, S. and Kahyo, H. },
title= {Geographical differences and time trends in the seasonality of birth in Japan},
year = {1994},
doi = {10.1093/ije/23.1.107},
journal = {Internation Journal of Epidemiology},
volume = {23},
number = {1},
pages = {107--118},
}