1. Abraham G C, Raman K (1986) In: Somers D A, Gengenbach B G, Biesboer D D, Hackett W P, Green C E (eds), Abstr 6th Internat Congr Plant Tissue and Cell Culture Minneapolis, MN, pp 294.
2. Agarwal B, Singh U, Banerjee M (1992) Plant Cell Tissue Organ Cult 30: 1–5
3. Ammirato P V (1983) In: Evans D A, Sharp W R, Ammirato P V, Yamada Y (eds), Handbook of plant cell culture, vol 1 Macmillan, NY, pp 82–123.
4. Arulpragassam P V, Latiff R (1986) Sri Lanka J Tea Sci 55: 44–47
5. Bano Z, Rajarathnam S, Mohanty B D (1991) J Hort Sci 66: 465–470