1. Akihama T, Omura M, Kozai I (1978) Further investigation of freeze-drying for deciduous tree pollen. In: Akihama T, Nakjima K (eds) Long-term preservation of favourable germplasm. Fruit Tree Research Station MAF, Japan, pp 1–7
2. Alexander MP, Ganeshan S (1988) The role of pollen cryobanks in genetic conservation. Genome 30:Suppl 1. 472
3. Andersen SB, Due IK, Olesen A (1987) The response of anther culture in genetically wide material of winter wheat (Triticum aestivum L.) Plant Breed 99:181–186
4. Andreica A, Sparchez C (1990) In vitro germination of sunflower pollen preserved at low temperatures. Stidii si Cercetari de Biologic. Ser Biol Veg 42:51–54
5. Bajaj YPS (1983) Regeneration of plants from pollen embryos of Arachis, Brassica and Triticum cryopreserved for one year. Curr Sci 52:484–486