B. PRAVEEN KUMAR, et al. “ULTRAVIOLET– B LIGHT INDUCED CHANGES IN ENERGY TRANSFER OF PHOTOSYSTEM II IN THE INTACT CELLS OF SPIRULINA PLATENSIS”. The Bioscan, vol. 5, no. 4, Dec. 2010, pp. 545-7, https://thebioscan.com/index.php/pub/article/view/518.