Fernández, Francisco Javier, Inmaculada Calvo, Sergio Montero, and Galaad Torró. “Effect of Perinatal Risk Factors on Gross Motor Development of Preterm Infants. Cross-Sectional Observational Study”. European Journal of Health Research 6, no. 2 (December 1, 2020): 169–180. Accessed December 5, 2025. https://revistas.uautonoma.cl/index.php/ejhr/article/view/1332.