@article{articlee242e64c,
title   = {Latitude and social habits as determinants of the distribution of morning and evening types in Brazil},
author = {Benedito-Silva, Ana Amélia and Menna Barreto, Roberto and Alam, M F and Rotenberg, L and Moreira, L F S and Menezes, A A L and Silva, H P and Marques, Nélson},
year = {1998},
journal   = {Biological Rhythm Research}
}