Heiner Ackermann Paul W. Goldberg Vahab S. Mirrokni Heiko Röglin Berthold Vöcking A Unified Approach to Congestion Games and Two-Sided Markets. 30-41 2007 conf/wine/2007 WINE http://dx.doi.org/10.1007/978-3-540-77105-0_7 db/conf/wine/wine2007.html#AckermannGMRV07