Singh, Surendra, and Nisha Tiwari. “Impact of Sodium Nitrate on Astaxanthin Production in Green Micro- Alga Haematococcus Pluvialis under Laboratory Condition”. International Journal of Scientific Research in Biological Sciences 7, no. 2 (April 30, 2020): 120–122. Accessed April 5, 2025. https://ijsrbs.isroset.org/index.php/j/article/view/348.