1. GREENACRE, M.J. 1978. Some objective methods of graphical display of a data matrix. English translation of doctoral thesis (Univ. of Paris VI). Univ. S. Afr., Pretoria.
2. HUREAU, J.C. 1966. Study on the diet of three Sub-Antarctic Nototheniid fishes. In: Symposium on Antarctic Oceanography, Santiago, Chile
3. McDOUGALL, I. 1971. Geochronology in Marion and Prince Edward Islands. In: Marion and Prince Edward Islands, ed. Van Zinderen Bakker Sr., E.M., Winterbottom, J.M. & Dyer, R.A. 396-408. A.A. Balkema, Cape Town.
4. UNDERHILL, L.G. 1981. Aiv ASCII FORTRAN program with dynamic core allocation for correspondence analysis. Technical report, Department of Mathematical Statistics, University of Cape Town.