1. Faust, M. (1989).Physiology of Temperate Zone Fruit Trees.Wiley, New York, USA. 169–234.
2. Goldsmith, E. E. and Monselise, S. P. (1970). Hormonal control of flowering in citrus and some other woody perennials. In:Plant Growth Substances.(Carr, D.J., Ed.).Proceedings of the Seventh International Conference on Plant Growth Substances.Canberra, Australia. Springer-Verlag, Berlin, Germany. 758–766.
3. Moran, R. and Southwick, S. (2000). Chemical bloom thinning of pome and stone fruits. In:Plant Growth Regulators in Agriculture and Horticulture.(Basra A.S., Ed.). The Haworth Press Inc., New York, NY, USA. 223–254.
4. Westwood, M. N. (1993).Temperate-Zone Pomology: Physiology and Culture.3rd Edition. Timber Press, Portland, OR, USA. 523 pp.