MAHALINGAM.P.U, MUNIAPPAN.K, ARUMUGAM.N, and SENTHIL MURUGAN.G, “USE OF AZOLLA BIOFERTILIZER IN POT CULTURE STUDIES WITH PADDY CROP ORYZA SATIVA”, Innovare J Ag Sci, vol. 2, no. 3, pp. 1–6, Oct. 2014.