Safaie, مریم, Shokravi, sh, Amirlatifi, فریبا, Soltani, ندا, Hosseini, زهرا. “The effect of salinity on survival, growth and ammonium liberation of cyanobacterium Nostoc sp.collected from paddy-fields of Golestan province at limited and unlimited carbon dioxide condition..” Journal of Plant Environmental Physiology, vol. 1, no. 4, 2007, pp. 41-48.