DDS. Melanie Fernanda Ferrín Yépez , Scholar. Angélica Miranda Arce , Ángela Mercedes Murillo Almache (2025) “Chronological Age and Nolla’s stages in first permanent molars in children: radiographic observation”, Cuestiones de Fisioterapia, 54(5), pp. 319–323. doi:10.48047/gm66nz84.