TY JOUR TI A STUDY OF LIFE CYCLE FEATURES OF THREE STRAINS OF CYANOBACTERIA NOSTOC CF. PUNCTIFORME VAUCH KW JO Bulletin of Nizhnevartovsk State University AU Egupova, E.Y. AU Sharipova, M.Y. AU Abdullin, S.R. PY 2019 IS PB Nizhnevartovsk State University