Greydanus, D. E., Omar, H., Pratt, H. D. Julkaisussa Pediatric Clinics of North America (2010)
Casavant, M. J., Blake, K., Griffith, J., Yates, A., Copley, L. R. M Julkaisussa Pediatric Clinics of North America (2007)
Greydanus, D. E., Patel, D. R. Julkaisussa Pediatric Clinics of North America (2002)