Corrales Morales, Mariela, et al. “Identification and Molecular Characterization of Tropical Cyanobacteria of the Genus Nostoc, Calothrix, Tolypothrix and Scytonema (Nostocales: Nostocaceae), With Possible Biotechnological Potential”. UNED Research Journal, vol. 9, no. 2, Sept. 2017, doi:10.22458/urj.v9i2.1710.