1. Austin, M.P. (1972), Models and analysis of descriptive vegetation data. In: Jeffers, J.N.R. Mathematical Models in Ecology, pp. 61–86. Blackwell Scientific, Oxford.
2. Austin, M.P. (1977), Vegetatio, 35, 165–75.
3. Barkman, J.J. (1958), Phytosociology and Ecology of Cryptogamic Epiphytes. Van Gorcum, Assen.
4. Bates, J.W. (1975a), J. Ecol., 63, 143–62.
5. Bates, J.W. (1975b), The Ecology and Physiology of Seashore Bryophytes. Ph.D. thesis, University of Bristol.