Pfeffer Karl-Heinz: Karstresearch - a traditional science involving recent applied tasks : Homage to Prof. Jakucs the famous hungarian karst scientist who introduced applied karst research in his department. In: Acta Universitatis Szegediensis : acta geographica, (34). pp. 7-24. (1995)
Pfeffer Karl-Heinz: The Swabian Alb : an anthropogenically transformed karst landscape. In: Táj, környezet és társadalom : ünnepi tanulmányok Keveiné Bárány Ilona professzor asszony tiszteletére = Landscape, environment ans society : studies in honour of professor Ilona Bárány-Kevei on the occasion of her birthday. pp. 569-580. (2006)