1. Ashwood-Smith MJ (1980) Preservation of microorganisms by freezing, freeze-drying and desiccation. In: Ashwood-Smith MJ, Farrant J (eds) Low temperature preservation in medicine and biology. Pitman Medical, Tunbridge Wells, pp 219–252
2. Ashwood-Smith MJ, Warby C (1971) Studies on the molecular weight and cryoprotective properties of PVP and Dextran. Cryobiology 8:453–464
3. Benson EE (1994) Cryopreservation. In: Dixon RA (ed) Practical plant cell culture: a practical approach. IRL, Oxford, UK, pp 147–166
4. Benson EE, Wilkinson M, Todd A, Ekuere U, Lyon J (1996) Developmental competence and ploidy stability in plants regenerated from cryopreserved potato shoot tips. CryoLetters 17:119–128
5. Berny JF, Hennebert GL (1991) Viability and stability of yeast cells and filamentous fungus spores during freeze-drying—effects of protectants and cooling rates. Mycologia 83:805–815