Diaz Herrera, William, Hector Fidel Osorio Zambrano, and Miguel Francisco Sandoval Cabrera. 2013. “Case Report: Multimodal Spinal Anesthesia in a Pediatric Patient With a Difficult Airway”. Colombian Journal of Anesthesiology 41 (3):218–222. https://www.revcolanest.com.co/index.php/rca/article/view/695.