@incollection{SchwarzKrewani, author = {Schwarz, Astrid and Krewani, Angela}, title = {Images of "true nature" - an introduction}, series = {Images of "true nature"}, booktitle = {Images of "true nature"}, editor = {Krewani, Angela and Schwarz, Astrid}, publisher = {Sch{\"u}ren}, address = {Marburg}, isbn = {978-3-89472-645-4}, pages = {4 -- 8}, language = {en} }