1. Infancy and human growth;Gesell,1928
2. Study of prehension in infants;Halverson;Genetic Psychology Monographs,1931
3. The acquisition of skill in infancy;Halverson;Journal of Genetic Psychology,1933
4. Studies on the grasping responses of early infancy. I.;Halverson;Journal of Genetic Psychology,1937
5. Development of visually directed reaching: The approach phase;Hofsten;Journal of Human Movement Studies,1979