1. Lorenz, M., Friedl, T., and Day, J. G. (2005) Perpetual maintenance of actively metabolizing microalgal cultures. In: Algal Culturing Techniques, (Andersen, R. A., ed.), Academic Press, New York, pp. 145–156.
2. Leeson, E. A., Cann, J. P., and Morris, G. J. (1984) Maintenance of algae and protozoa. In: Maintenance of Microorganisms, (Kirsop, B. E. and Snell, J. J. S., eds.), Academic Press, London, UK, pp. 131–160.
3. Cameron, R. E. (1962) Species of Nostoc Vauch. Occurring in the Sonoran desert in Arizona. Transcripts of the American Microscopy Society
81, 379–384.
4. McGrath, M. S., Daggett, P., and Dilworth, S. (1978) Freeze-drying of algae: Chlorophyta and Chrysophyta. J. Phycol.
14, 521–525.
5. Day, J. G., Priestley, I. M., and Codd, G. A. (1987) Storage, recovery and photosynthetic activities of immobilized algae. In: Plant and animal cells, process possibilities, (Webb, C. and Mavituna, F., eds.), Ellis Horwood, Chichester, UK, pp. 257–261.