1. L’axe corporel, musculature et innervation: étude anatomique;Thomas,1948
2. Some results of studies in the physiology of posture;Magnus;Lancet,1926
3. la naissance de l’intelligence chez l’enfant;Piaget,1936
4. The visual cliff;Gibson;Scientific American,1960
5. The origin of form perception;Fantz;Scientific American,1961