1. The development of shared attention during infancy;Adamson;Annals of Child Development,1991
2. Neonate orientation behavior towards the human voice;Alegria;Infant Behavior and Development,1978
3. The emotions and the will;Bain,1855
4. The message ‘this is play’;Bateson,1955
5. Changes in the content and timing of mothers' talk to infants;Boerse;British Journal of Developmental Psychology,1994