DDS. Melanie Fernanda Ferrín Yépez , Scholar. Angélica Miranda Arce , Ángela Mercedes Murillo Almache. Chronological Age and Nolla’s stages in first permanent molars in children: radiographic observation. CDF [Internet]. 2025 Feb. 20 [cited 2025 May 18];54(5):319-23. Available from: https://cuestionesdefisioterapia.com/index.php/es/article/view/3009