1. Graham, G. N., Thompson, E. W., 1968: Criteria for the identification of unusual amino acids and related compounds by means of automated column chromatography. In: 6th Colloquium in Amino Acid Analysis. Technicon Monograph 3. Technicon International Division. Geneva. 87?104.
2. Horner, M., Street, H. E., 1978: Problems encountered in the culture of isolated pollen of a Burley cultivar ofNicotiana tabacum. J. exp. Bot.29 (108), 217?226.
3. Nitsch, C., 1974: La culture de pollen isolé sur milieu synthétique. C. R. Acad. Sci. (Paris)278, 1031?1034.
4. ?,Norreel, B., 1973: Effet d'un choc thermique sur le pouvoir embryogène du pollen deDatura innoxia cultivé dans l'anthère ou isolé de l'anthère. C. R. Acad. Sci. (Paris)276, 303?306.
5. Nunn, P. B., Vega, A., 1968: Use of lithium buffers with a single column amino acid analyser. In: 6th Colloquium in Amino Acid Analysis. Technicon Monograph 3. Technicon International Division. Geneva. 80?86.