1. Abdelnour, A., Mora, A. & Villalobos, V.M. 1992a Cryopreservation of zygotic embryos of Musa acuminata (AA) and M. balbisiana (BB). Cryo Letters 13, 159?164.
2. Abdelnour, A., Villalobos, V.M. & Engelmann, F. 1992b Cryopreservation of zygotic embryos of Coffea spp. Cryo Letters 13, 297?302.
3. Anon. 1993 Ex Situ Storage of Seeds, Pollen and in Vitro Cultures of Perennial Woody Plant Species. Forestry Paper 113. Rome: Food and Agriculture Organization.
4. Anon. 1994a Survey of Existing Data on ex Situ Collections of Plant Genetic Resources for Food and Agriculture. Rome: Food and Agriculture Organization.
5. Anon. 1994b Establishment and Operation of a Pilot in Vitro Active Genebank. Cali: Centro Internacional de Agricultura Tropical; and Rome: International Plant Genetic Resources Institute.