@incollection{WaetzoldRing, author = {W{\"a}tzold, Frank and Ring, I.}, title = {{\"O}konomische Instrumente des Natur- und Landschaftsschutzes in l{\"a}ndlichen R{\"a}umen}, language = {de} } @incollection{WaetzoldRingKlauer, author = {W{\"a}tzold, Frank and Ring, I. and Klauer, Bernd}, title = {Towards regional sustainability: the need for interdisciplinary and applied research}, language = {en} } @incollection{WaetzoldRing, author = {W{\"a}tzold, Frank and Ring, I.}, title = {Naturschutz im Torgauer Raum: Ziele, Konfliktfelder und der Einsatz {\"o}konomischer Instrumente}, language = {de} }