1. Alfermann, A.W., Borg, H.M., Doller, P.D., Hagedorn, W., Heins, M., Wahl, J. and Reinhard, E. (1977). Biotransformation of cardiac glycosides by plant cell cultures. In: Plant Tissue Culture and its Bio-technological Application. W. Barz, E. Reinhard and M.H. Zenk (eds.), Springer Verlag, Berlin, pp. 125–141.
2. Archambault, J., Volesky, B. and Kurz, W.G.W. (1990). Development of bioreactors for the culture of surface immobilized plant cells. Biotechnol. Bioeng. 35: 702–711.
3. Asada, M. and Shuler, M.L. (1989). Stimulation of ajmalicine production and excretion from Catharanthus roseus: effects of adsorption in situ elicitors and alginate immobilization. Appl. Microbiol. Biotechnol. 30: 475–481.
4. Beiderbeck, R. and Knoop, B. (1987). Two phase culture. In: Cell Culture and Somatic Cell Genetics of Plants, Vol. 4. F. Constabel and I.K. Vasil (eds.), Academic Press, New York, pp. 255–266.
5. Brodelius, P., Deus, B., Mosbach, K. and Zenk, M.H. (1979). Immobilized plant cells for the production and transformation of natural products. FEBS Lett. 103: 93–97.