* «Evaluation of occurrence of PCDD/PCDF and POPs in wastes and their potential to enter the food chain», Universität Bayreuth, Fachbereich Prof. Hutzinger, September 2000
* "Evaluation of occurrence of PCDD/PCDF and POPs in wastes and their potential to enter the food chain", Universität Bayreuth, afdeling van prof. Hutzinger, september 2000.