• Heap, A. J. & Newman, E. I. (1980). Links between roots by hyphae of vesicular-arbuscular mycorrhizas. New Phytologist, 85, 169171.
  • Herrera, R., Merida, T., Stark, N. & Jordan, C. F. (1978). Direct phosphorus transfer from leaf litter to roots. Naturwissenschaften, 65, 208.
  • Marshall, J. K. (1977). Biomass and production partitioning in response to environment in some North American grasslands. In: The Belowground Ecosystem (Ed. by J. K.Marshall), pp. 7384. Colorado State University, Fort Collins .
  • Mosse, B. (1973). Advances in the study of vesicular-arbuscular mycorrhiza. Annual Review of Phytopathology, 11, 171.
  • Newbery, D. M. & Newman, E. I. (1978). Competition between grassland plants of different initial sizes. Oecologia, 33, 361.
  • Phillips, J. M. & Hayman, D. S. (1970). Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infection. Transactions of the British Mycological Society, 55, 158.
  • Stark, N. M. & Jordan, C. F. (1978). Nutrient retention by the root mat of an Amazonian rain forest. Ecology, 59, 434.
  • Tinker, P. B. H. (1975). Effects of vesicular-arbuscular mycorrhizas on higher plants. In: Symbiosis (Ed. by D. H.Jennings & D. L.Lee), pp. 325349. Cambridge University Press, Cambridge .
  • Woods, F. W. (1970). Interspecific transfer of inorganic materials by root systems of woody plants. Journal of Applied Ecology, 7, 481.
  • Woods, F. W. & Brock, K. (1964). Interspecific transfer of Ca-45 and P-32 by root systems. Ecology, 45, 886.