1. Alexander, M.P., Rao, T.C. (1968) Curr. Sci. 37: 415.
2. Ammirato, P.V. (1983) In Handbook of Plant Cell Culture. Vol. 1 (Evans, D.A., Sharp, W.R., Ammirato, P.V., Yamada, Y. eds) (MacMillan Publ., London, 82?123).
3. Boyes, C.J., Vasil, I.K. (1984) Plant Sci. Lett. 35: 153?157.
4. Gamborg, O.L., Miller, R.A., Ojima, L. (1968) Exp. Cell Res. 50: 151?158.
5. Ho, J.W., Vasil, I.K. (1983) Protoplasma 118: 169?180.