1. Y. Ogawa and J. A. D. Zeevaart, in “Physiology of Flowering inPharbitis nil,”ed. by S. Imamura, Japanese Society of Plant Physiologists. Tokyo, 1967, pp. 107–119.
2. N. Takahashi, I. Yamaguchi, and H. Yamane, in “Chemistry of Plant Hormones,” ed. by N. Takahashi, CRC Press, Boca Raton, Florida, 1986, pp. 57–151.