Suligavi, Shashidhar S., Divya K. Vishwanath, Shilpa Gokale, and S. S. Doddamani. “Diphtheria: A Re-Emerging Infectious Disease”. International Journal of Otorhinolaryngology and Head and Neck Surgery 7, no. 3 (February 24, 2021): 475–480. Accessed October 10, 2025. https://www.ijorl.com/index.php/ijorl/article/view/2762.