@inproceedings{Pichlmair.2007,
 author = {Pichlmair, Martin and Kayali, Fares},
 title = {Levels of Sound: On the Principles of Interactivity in Music Video Games},
 url = {\url{http://www.digra.org/dl/db/07311.14286.pdf}},
 urldate = {02.07.2009},
 pages = {424-430},
 editor = {DIGRA},
 booktitle = {Situated Play, Proceedings of DiGRA 2007 Conference},
 year = {2007},
 address = {Tokyo?}
}