Chamberlain D. B. Prenatal Stimulation: Experimental Results // Birth Psychology / accessed June 20, 2012 // .
5
Van de Carr F. R., Lehrer M. Enhancing Early Speech, Parental Bonding, and Infant Physical Development Using Prenatal Intervention in a Standard Obstetrical Practice // Pre- & Perinatal Psychology Journal, 1986. Vol. 1, № 1. P. 20–30.