1. The nature of the earliest spontaneous activity of the chick embryo;Alconero;J. Embryol. Exp. Morphol.,1965
2. “Theory and Problems of Child Development.'';Ausubel,1970
3. Polyneuronal innervation of kitten skeletal muscle;Bagust;J. Physiol.,1973
4. Untersuchungen zur Koordination der Kopf und Beinbewegungen beim Haushuhn;Bangert;Z. Tierpsychol.,1960
5. The development of behavior in foetal sheep;Barcroft;J. Comp. Neurol.,1939