• Bakker, D. (1960) A comparative life-history of Cirsium arvense (L.) Scop, and Tussilago farfara L., the most troublesome weeds in the newly reclaimed polders of the former Zuiderzee. In: The Biology of Weeds (Ed. by J. L.Harper), pp. 205222. Blackwell Scientific Publications, Oxford .
  • Beattie, A. J. & Lyons, N. (1975) Seed dispersal in Viola (Violaceae): adaptations and strategies. American Journal of Botany 62, 714722.
  • Brandmayr, P. & Brandmayr, T. (1975) Biologia di Ophonus puncticeps Steph. cenni sulla fitofagia della larve e loro etologia (Coleoptera, Carabidae). Annali della Facolta di Scienze Agraric della Universita degli Studi di Torino, 9, 421430.
  • Burrows, F. M. (1973) Calculation of the primary trajectories of plumed seeds in steady winds with variable convection. New Phytologist, 72, 647664.
  • Burrows, F. M. (1975a) Wind-borne seed and fruit movement. New Phytologist, 75, 405418.
  • Burrows, F. M. (1975b) Calculation of the primary trajectories of dust seeds, spores and pollen in unsteady winds. New Phytologist, 75, 389403.
  • Cook, R. (1980) The biology of seeds in the soil. In: Demography and Evolution in Plant Populations (Ed by O. T.Solbrig), pp. 107129. University of California Press, Berkeley and Los Angeles .
  • Feekes, W. (1936) De ontwikkeling van de natuurlijke vegetatie in de Wieringermeerpolder, de eerste groote droogmakerij van de Zuiderzee. Nederlandsch Kruidkundig Archief, 46, 1294.
  • Harper, J. L. (1977) Population Biology of Plants. Academic Press, London .
  • Heukels, H. & Oostroom, S. J. Van (1970) Flora van Nederland. 16th Edn. Wolters–Noordhoff, Groningen .
  • Lacey, E. P. (1982) Timing of seed dispersal in Daucus carota. Oikos, 39, 8391.
  • Levin, D. A. & Kerster, H. W. (1974) Gene flow in seed plants. Evolutionary Biology, 7, 139220.
  • Monte1th, J. L. (1975) Principles of Environmental Physics. 2nd Edn. Edward Arnold, London .
  • Müller-Schneider, P. (1977) Verbreitungsbiologie (Diasporologie) der Blütenpflanzen. Veröffentlichungeu des Geobotanischen Institutes der Eidgenössischen Technischen Hochsclnile, Stiftung Rübel, in Zürich, 30, 2ten Aufl.
  • Pijl, L. van der (1972) Principles of Dispersal in Higher Plants. 2nd Edn. Springer, Berlin .
  • Rabinowitz, D. & Rapp, J. K. (1981) Dispersal abilities of seven sparse and common grasses from a Missouri prairie. American Journal of Botany, 68, 616624.
  • Regehr, D. L. & Bazzaz, F. A. (1979) The population dynamics of Erigeron canadensis, a successional winter annual. Journal of Ecology, 67, 923933.
  • Rösen, M. W. (1977) Enkele Plantekologiese aspekte van die Hester Malan- natuurrescrvaat. M.Sc. Thesis, University of Pretoria.
  • Salisbury, E. J. (1942) The Reproductive Capacity of Plants. G. Bell and Sons, London .
  • Salisbury, E. J. (1961) Weeds and Aliens. Collins Press, London .
  • Schmidt, W. (1918) Die Verbreitung von Samen und Bliitenstaub durch die Luftbewegung. Österreichischc Botanische Zeitschrift, 67, 313328.
  • Sheldon, J. C. & Buhrows, F. M. (1973) The dispersal effectiveness of the achene-pappus units of selected compositae in steady winds with convection. New Phytologist, 72, 665675.
  • Verkaak, H. J., Schenkeveld, A. J. & Brand, J. M. (1983) On the ecology of short– lived forbs in chalk grasslands: microsite tolerances in relation to vegetation structure. Vegetation, 52, 91102.
  • Watkinson, A. R. (1978) The demography of a sand dune annual: Vulpia fasciculata III. The dispersal of seeds. Journal of Ecology, 66, 483498.
  • Werner, P. A. (1975) A seed trap for determining patterns of seed deposition in terrestrial plants. Canadian Journal of Botany, 53, 810813.