1. Bayley scales of infant development;Bayley,1993
2. Bayley, N. (2014). Bayley Scales of Infant Development (3th ed. Dutch version). Van Baar, Steenis, A. L., Verhoeven, L. J. P., Hessen D. J. Bayley-III-NL, Manual. Amsterdam: Pearson Assessment and Information B.V.
3. Perinatale Zorg in Nederland 2013 (Perinatal care in the Netherlands 2013);Brouwers,2014
4. Comparison of Griffiths-II and Bayley-II tests for the developmental assessment of high-risk infants;Cirelli;Infant Behavior and Development,2015
5. Perinatal and postnatal factors in very preterm infants and subsequent cognitive and motor abilities;Cooke;Archives of Disease in Childhood Fetal and Neonatal Edition,2005