Dr.S. Malathi, Dr.D. Paul Dhinakaran, B.Yogesswari. “Impact of Covid-19 on Indian Pharmaceutical Industry”. Annals of the Romanian Society for Cell Biology, vol. 25, no. 6, June 2021, pp. 11155-9, https://www.annalsofrscb.ro/index.php/journal/article/view/7577.