@article{HaugWeber, author = {Haug, Sonja and Weber, Karsten}, title = {Kaufen oder Tauschen? Eine Studie {\"u}ber das Verhalten von Musikkonsumenten}, series = {Der Musikmarkt}, volume = {34}, journal = {Der Musikmarkt}, pages = {24 -- 26}, language = {de} } @article{WeberHaug, author = {Weber, Karsten and Haug, Sonja}, title = {Wie verh{\"a}lt sich der typische MP3-Nutzer?}, series = {Der Musikmarkt}, journal = {Der Musikmarkt}, pages = {26 -- 27}, language = {de} }