1. Butler DR, Pears E, Child RD and Brain P (1988) Effects of triazole growth retardants on oilseed rape, photosynthesis of single leaves. Ann Appl Biol 114: 331?337
2. Child RD, Butler DR, Sims IM, Johnson W and Thorn M (1987) Control of canopy structure in oilseed rape with growth regulators and consequences for yield. In: Symposium on Plant Growth Regulators for Agricultural and Amenity use. B.C.P.C. Monograph No. 36: 21?35
3. Child RD, Evans DE, Allen J and Lovell DJ (1991) Manipulation of canopy structure and components in oilseed rape with PGRs for improved performance and yield. In: Child RD and Pinfield NJ (eds) Manipulation of Canopy Structure in Arable Crops, pp 79?95. B.S.P.G.R., Bristol
4. Graebe JE (1987) Gibberellin biosynthesis and control. Ann Rev Plant Physiol 38: 419?465
5. Grossman K (1990) Plant growth retardants as tools in physiological research. Physiol Plant 78: 640?648