1. Agudo, L.C., Gavidia, P., Perez‐Bermudez, P. and Segura, J. (1995), “PEG precipitation, a required step for PCR amplification of DNA from wild plants of Digitalis obscura L.”, Bio Techniques, Vol. 18, pp. 766‐8.
2. Bake, S.S., Rugh, C.L. and Kamalay, J.C. (1990), “DNA and RNA isolation from recalcitrant plant tissues”, Bio Techniques, Vol. 9, pp. 268‐72.
3. Balasubramanian, N., Kumar, K.R. and Anandswamy, B. (1979), “Packaging and storage studies on ground turmeric (C. longa L.) in flexible consumer packages”, Indian Spices, Vol. 16, pp. 10‐13.
4. Amplification and sequencing of 16/18S rDNA from gel-purified total plant DNA
5. Cheng, K.T., Chang, H.C., Su, C.H. and Hsu, F.L. (1997), “Identification of dried rhizomes of Coptis species using random amplified polymorphic DNA”, Bot. Bull. Acad. Sin., Vol. 38, pp. 241‐4.