Srivastava, Deepak, Bhanu Singh, and Arvind Tiwari. “Various Mutations of Corona Virus and Its Effects-an Extensive Review”. Anusandhaan - Vigyaan Shodh Patrika 9, no. 1 (October 15, 2021): 81-88. Accessed August 5, 2025. https://anushandhan.in/index.php/ANSDHN/article/view/1720.