@article{Lachmann1990, author = {Lachmann, Eckhard}, title = {Wechselkurs}, series = {WISU}, journal = {WISU}, year = {1990}, language = {de} } @article{Lachmann1990, author = {Lachmann, Eckhard}, title = {Leasing}, series = {WISU}, journal = {WISU}, year = {1990}, language = {de} }