Lenhoff, H. M. & Perales, O. & Hickok, G. (2001). "Absolute pitch in Williams syndrome". Music Perception18 (4): 491–503. doi:10.1525/mp.2001.18.4.491. ISSN0730-7829.
Heaton, P. & Hermelin, B. & Pring, L. (1998). "Autism and pitch processing: A precursor for savant musical ability". Music Perception15 (3): 291–305. doi:10.2307/40285769.
Kupferstein, H. & Walsh, B. (2014). "Non-Verbal Paradigm for Assessing Individuals for Absolute Pitch". World Futures. doi:10.1080/02604027.2014.989780.
Lenhoff, H. M. & Perales, O. & Hickok, G. (2001). "Absolute pitch in Williams syndrome". Music Perception18 (4): 491–503. doi:10.1525/mp.2001.18.4.491. ISSN0730-7829.