@article{article3247b5db,
title   = {Sleep / wake cycle in 4-to 14-month old children: general aspects and sex differences},
author = {Menna Barreto, L. S. and Montagner, Hubert and Soussignan, R. and Koch, P.},
year = {1989},
journal   = {Brazilian Journal of Medical and Biological Research}
}