Kaden, S. <https://pure.iiasa.ac.at/view/iiasa/2000.html>  (1986).  Multi-Criteria Analysis and Simulation for Long-Term Water Management in Open-Pit Lignite Mining Areas.    In:  Systems Analysis Applied to Water and Related Land Resources.  pp. 209-213 Oxford, UK: Pergamon Press.  ISBN 0080334253