Boyshin Balsa, Rebalde, and Paran Lelis Christhoffer. “Modified Bass Diffusion Model to Study Adoption of Covid–19 Vaccines in the Philippines: Input for Inoculation Rollout”. American Journal of Multidisciplinary Research and Innovation 1, no. 4 (September 22, 2022): 76–85. Accessed March 19, 2024. https://journals.e-palli.com/home/index.php/ajmri/article/view/603.