1. Anagnostidis, K. & J. Komárek, 1985. Modern approach to the classification system of Cyanophytes. 1.—introduction. Algological Studies 38/39: 291–302.
2. Anagnostidis, K. & J. Komárek, 1989. Modern approach to the classification system of Cyanophytes. 4—Nostocales. Algological Studies 56: 247–345.
3. Barker, G. L. A., A. Konopka, B. A. Handley & P. K. Hayes, 2000. Genetic variation in Aphanizomenon (Cyanobacteria) colonies from the Baltic Sea and North America. Journal of Phycology 36: 947–950.
4. Bianchi, T. S., E. Engelhaupt, P. Westman, T. Andrén, C. Rolff & R. Elmgren, 2000. Cyanobacterial blooms in the Baltic Sea: natural or human induced? Limnology and Oceanography 45: 716–726.
5. Castenholz, R. W., 2001. General characteristics of the cyanobacteria. In Boone, D. R. & R. W. Castenholz (eds), Bergey’s Manual of Systematic Bacteriology, 2nd edn, Vol. 1. Springer, New York, pp 474–487.