1. COCKSHULL, K. E. (1972). Photoperiodic control of flowering in the chrysanthemum. InCrop processes in controlled environments, (Ed. A. R. Rees, K. E. Cockshull, D. W. Hand and R. G. Hurd). Academic Press, London, 235–50.
2. HAUPT, W. (1969).Pisum sativumL. InThe induction of flowering(Ed. L. T. Evans), MacMillan Co., Australia, 393–408.
3. HESLOP-HARRISON, J. and HESLOP-HARRISON, Y. (1970). The state of the apex andtheresponse to inductionin Cannabis sativa. InCellular and molecular aspects of floral induction, (Ed. G. Bernier), Longman, London, 3–26.