K. GIRIDHAR KUMAR, et al. “UV-B STRESS INDUCED ALTERATION IN THE PHOTOSYNTHETIC APPARATUS OF THE CYANOBACTERIA SYNECHOCOCCUS 6301”. The Bioscan, vol. 6, no. 3, May 2011, pp. 371-4, https://thebioscan.com/index.php/pub/article/view/1740.