Dhanpal, Radhika D., Vikram M. Shivappagoudar, Gerard Gonsalvez, Reshma Vithayathil, and Ann Mary Alappat. 2017. “Anesthetic Management of a Patient With Retrosternal Goiter Using a Double‑lumen Endotracheal Tube”. Karnataka Anaesthesia Journal 3 (1):13-15. http://karnatakaanesthesiajournal.in/index.php/kaj/article/view/138920.