Geslani, Marko, Bill Mak, Michio Yano, and Kenneth G. Zysk. “Garga and Early Astral Science in India”. History of Science in South Asia 5, no. 1 (December 22, 2017): 151–191. Accessed December 1, 2021. https://journals.library.ualberta.ca/hssa/index.php/hssa/article/view/21.