1. The development of the smiling response in early infancy;Ambrose,1961
2. Neonatal smiling and rapid eye movement states;Emde;This Journal,1969
3. Behavioral and EEG correlates of undifferentiated eye movement states in infancy;Emde;Abstr Psychophysiology,1968
4. The infant's fear of strangers and the flight response;Freedman;J. Child Psychol. Psychiat.,1961
5. The course of infant smiling in four child-rearing environments in Israel;Gewritz,1965