1. Abe, K. 1980. ORD and CD spectra.In K. Hayashi, ed., Plant Pigments. Yokendo. Tokyo, pp. 137–139 (in Japanese).
2. Abe, K., Yoshitama, K. and Iwashita, T. 1990. NMR of rubrocinerarin. Proc. 55th Ann. Meet. Bot. Soc. Jpn. p. 320 (in Japanese).
3. Abe, K., Yoshitama, K. and Iwashita, T. 1992. NMR of rubrocinerarin, (II). Proc. 57th Ann. Meet. Bot. Soc. Jpn. p. 285 (in Japanese)
4. Asen, S., Stewart, R.N. andNorris, K.H. 1977. Anthocyanin and pH involved in the color of ‘Heavenly Blue’ morning glory. Phytochemistry16: 1118–1119.
5. Goto, T. 1987. Structure, stability and color variation of natural anthocyanins.In. W. Herz, H. Grisebach, G.W. Kirby, Ch. Tamm, eds., Progress in the chemistry of organic natural products 52. Springer-Verlag, Wien, pp. 113–158.