Amirlatifi, فریبا, Shokravi, sh, Safaei, مریم, Hosseini kolbadi, زهرا (2007). The effect of acidity at limited irradiance on survival, growth, pigment composition and ammonium liberation of soil cyanobacterium 
Nostoc sp., collected from paddy-fields of Golestan province. *Journal of Plant Environmental Physiology*, 2(6), 38-45.