1. Bernhardt, H. & J. Clasen, 1985. Recent developments and perspective of restoration for artificial basins used for water supply. Lake Pollution and Recovery International Congress: European Water Pollution Control Association, Proceedings, Rome. 15?18.
2. Castri di, F., A. J. Hansen & M. M. Holland, 1988. Preface. Biology International, Special Issue 17: 1?8.
3. Ebina, J., T. Tsutsui & T. Shirai, 1983. Simultaneous determination of total nitrogen and total phosphorus in water using peroxodisulfate oxidation. Wat. Res. 17: 1721?1726.
4. Hansen, A. J., F. di Castri & R. J. Naiman, 1988a. Ecotones: What and why. Biology International, Special Issue 17: 9?46.
5. Hansen, A. J., F. di Castri & P. G. Risser, 1988b. A New Scope Project. Ecotones in a changing Environment: The Theory and management of landscape boundaries. Biology International, Special Issue 17: 137?161.