Fajardo-Escolar, Angélica Paola, et al. “Ultrasound-Guided Selective Intubation in a Preterm Neonate Undergoing Type-C Esophageal Athresia Correction. Case Report”. Colombian Journal of Anesthesiology, vol. 46, no. 1, Jan. 2018, pp. 75-78, https://www.revcolanest.com.co/index.php/rca/article/view/331.