1. Bartel, A.: Analysis of Landscape Pattern: Towards a `Top Down' Indicator for Evaluation of Landuse, Ecol. Model., 130, 1–3, 87–94, 2000.
2. European Commission (EC): Water for Life, EU Water Initiative, International Cooperation – from knowledge to action, 26 pp., 2003.
3. Fabre, D. and Ribolini, A.: The lower discontinuous permafrost Boundary in the Argentera Massif (Maritime Alps, Italy): insight from rock glacier geoelectrical soundings, Proceedings of the 8th International Conference on Permafrost, Extended Abstracts on Current Research and Newly Available Information, 33–34, 2003.
4. Flügel, W.-A.: Delineating Hydrological Response Units (HRU's) by GIS analysis for regional hydrological modelling using PRMS/MMS in the drainage basin of the River Bröl, Germany, Hydrol. Process., 9, 423–436, 1995.
5. Flügel, W.-A.: Systembezogene Entwicklung regionaler hydrologischer Modellsysteme, Wasser & Boden, 52, 3, 14–17, 2000.