Dwivedi, R. K., S. K. Shukla, C. P. Shukla, P. K. Misra, and M. K. Seth. “Cyanophycean Flora 0f Southern Himanchal Pradesh, India”. Ecoprint: An International Journal of Ecology, vol. 15, June 2009, pp. 29-36, doi:10.3126/eco.v15i0.1939.