• Bhandari, B. & Nicholas, D. J. D. (1981). Some properties of glutamine synthetase from the nitrifying bacterium Nitrosomonas europaea. Australian Journal of Biological Science, 34, 527539.
  • Brown, C. M., Macdonald-Brown, D. S. & Meers, J. L. (1974). Physiological aspects of microbial inorganic nitrogen metabolism. Advances in Microbial Physiology 11, 152.
  • Brownell, P. F. & Nicholas, D. J. D. (1967). Some effects of sodium on nitrate assimilation and N2 fixation in Anabaena cylindrica. Plant Physiology, 42, 915921.
  • Itzhaki, R. F. & Gill, D. M. (1964). A microbiuret method for estimating proteins. Analytical Biochemistry 9, 401410.
  • Miflin, B. J., Lea, P. J. & Wallsgrove, R. M. (1980). The role of glutamine in ammonia assimilation and reassimilation in plants. In: Glutamine: Metabolism, Ensymology and Regulation (Ed. by J.Mora & R.Palacios), pp. 213234. Academic Press. New York .
  • Mora, J., Dàvila, G., Espin, G., Gonzalez, A., Guzman, J., Hernàndez, G., Hummelt, G., Lara, M., Martínez, E., Mora, Y. & Romero, D. (1980). Glutamine metabolism in Neurospora rassa.. In: Glutamine: Metabolism, Enzymology and Regulation (Ed. by. Mora & R.Palacios), pp. 185211. Academic Press. New York .
  • Pearson, V. & Read, D. J. (1975). The physiology of the mycorrhizal endophyte of Calluna vulgaris. Transactions of the British Mycological Society, 64, 17.
  • Raven, J. A. & Smith, F. A. (1976). Nitrogen assimilation and transport in vascular land plants in relation to intracellular pH regulation. The New Phytologist 76, 415431.
  • Read, D. J. & Sthibley, D. P. (1973). Effect of mycorrhizal infection on nitrogen and phosphorus nutrition of ericaceous plants. Nature, New Biology 244, 8182.
  • Shapiro, B. M. & Stadtman, E R. (1970). Glutamine synthetase (Escherichia coli). Methods in Enzymology, 17A, 910922.
  • Smith, F. A. & Walker, N. A. (1978). Entry of methylammonium and ammonium ions in Chara internodal cells. Journal of Experimental Botany 29, 107120.
  • Stribley, D. P. & Read, D. J. (1974). The biology of mycorrhiza in the Ericaceae. IV. The effect of mycorrhizal infection on uptake of 15N from labelled soil by Vaccinium macrocarpon (Ait). The New Phytologist 73, 11491155.
  • Stribley, D. P. & Read, D. J. (1975). Some nutritional aspects of the biology of ericaceous mycorrhizas. In: Endomycorrhizas (Ed. by F. E.Sanders, B.Mosse & P. B.Tinker), pp. 195207. Academic Press. New York .