Formalejo, Jan Paul, and Jay Pee Amable. 2021. “Cerebro-Spinal Fluid Leak in Skull Base Reconstruction Using Hadad - Bassagasteguy Flap After Endoscopic Endonasal Transsphenoidal Surgery: A Case Series”. Philippine Journal of Otolaryngology Head and Neck Surgery 36 (2):22. https://pjohns.pso-hns.org/index.php/pjohns/article/view/1797.