• Audus, L. J. (1967). The transport of growth regulators in plants. Agrochimica, 11, 309.
  • Craft, A. S. (1964). The physiology and biochemistry of herbicides. Academic Press, New York .
  • Field, R. J. & Peel, A. J. (1971a). The metabolism and radial movement of growth regulators and herbicides in willow stems. New Phytol., 70, 743.
  • Field, R. J. & Peel, A. J. (1971b). The movement of growth regulators and herbicides into the sieve elements of willow. New Phytol., 70, 997.
  • Funderburk, H. H. & Lawrence, J. M. (1964). Mode of action and metabolism of diquat and paraquat. Weeds, 12, 259.
  • Hoad, G. V. & Peel, A. J. (1965). Studies on the movement of solutes between the sieve tubes and surrounding tissues in willow. I. Interference between solutes and rate of translocation measurements. J. exp. Bot., 16, 433.
  • Peel, A. J. Field, R. J., Coulson, C. L. & Gardner, D. C. J. (1969). Movement of water and solutes in sieve tubes of willow in response to puncture by aphid stylets. Evidence against a mass flow of solution. Physiologia Pl., 22, 768.
  • Slade, P. & Bell E. G. (1966). The movement of paraquat in plants. Weed Res., 6, 267.
  • Spanner, D. C. & Prebble, J. N. (1962). The movement of tracers along the petiole of Nymphoides peltatum. I. A preliminary study with 137Cs. J. exp. Bot., 13, 294.
  • Yamaguchi, S. (1964). Analysis of 2,4-D transport. Higardia, 36, 349.