@book{Bitzer2004, author = {Bitzer, Jürgen and Schrettl, Wolfram and Schröder, Philipp J. H.}, year = {2004}, isbn = {3-935058-89-6}, language = {eng}, copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen}, title = {Intrinsic motivation in open source software development}, url = "http://dx.doi.org/10.17169/FUDOCS_document_000000000455", }