1. Banno, K., S. Hayashi and K. Tanabe. 1982. Physiological studies on flower bud formation of Japanese pear. 1. Flower bud formation and changes in endogenous growth regulators of ‘Shinsui’ and ‘Hosui’ pears. Fac. Agric. Tottori. Univ. Bull. 34: 1–7 (In Japanese with English abstract).
2. Banno, K., S. Hayashi and K. Tanabe. 1986. Morphological and histological studies on flower bud differentiation and development in Japanese pear. J. Japan. Soc. Hort. Sci. 55: 258–265.
3. Bittenbender, H. C. and G. S. Howell, Jr. 1974. Adaptation of the Spearman–Kärber method of estimating the T50 of cold stressed flower buds. J. Amer. Soc. Hort. Sci. 99: 187–189.
4. Fujita, Y. 2014. A manuring practice that supports consistent production and environmental preservation of Japanese pear. Kajitsu Nippon 69: 54–58 (In Japanese).
5. Honjo, H. and M. Omura. 1987. Seasonal changes in cold hardiness of Japanse pear. J. Agric. Meteorol. 43: 143–146 (In Japanese).