1. Lenz, E (1969). Effect of daylength and temperature on the vegetative and reproductive growth of ‘Washington’ navel orange.Proceedings of the First International Citrus Symposium, University of California, Riverside.(Chapman, H. D., Ed.).1, 333–8.
2. Moncur, M. W. (1988).Floral development of tropical and subtropical fruit and nut species.C.S.I.R.O., Division of Water and Land Resources, Australia.