Anneloes L. van Baar, PhD, Aleid G. van Wassenaer, MD, PhD, Judy M. Briët, PhD, Friedo W. Dekker, PhD, Joke H. Kok, MD, PhD, Very Preterm Birth is Associated with Disabilities in Multiple Developmental Domains, Journal of Pediatric Psychology, Volume 30, Issue 3, April/May 2005, Pages 247–255, https://doi.org/10.1093/jpepsy/jsi035
dx.doi.org
Larson, Sheryl A.; Lakin, K. Charlie; Anderson, Lynda; Kwak Lee, Nohoon; Lee, Jeoung Hak; Anderson, Deborah (2001). “Prevalence of Mental Retardation and Developmental Disabilities: Estimates from the 1994/1995 National Health Interview Survey Disability Supplements”. 《American Journal on Mental Retardation》 106 (3): 231. doi:10.1352/0895-8017(2001)106<0231:POMRAD>2.0.CO;2. ISSN0895-8017.