Jens Happe Heiko Koziolek Ralf Reussner Parametric Performance Contracts for Software Components with Concurrent Behaviour. 91-106 2007 182 Electr. Notes Theor. Comput. Sci. http://dx.doi.org/10.1016/j.entcs.2006.09.033 db/journals/entcs/entcs182.html#HappeKR07