1. The embryology of behavior;Gesell,1945
2. Sleep patterns of the newborn;Parmelee;J. Pediat.,1961
3. Schlafen und Wachen in der kindlichen Entwicklung;Hellbrügge,1959
4. Feeding behavior of infants;Gesell,1937
5. Sleep characteristics of infants;Kleitman;J. Appl. Physiol.,1953