Johann Eder Wolfgang Gruber Euthimios Panagos Temporal Modeling of Workflows with Conditional Execution Paths. 243-253 http://link.springer.de/link/service/series/0558/bibs/1873/18730243.htm 2000 conf/dexa/2000 DEXA db/conf/dexa/dexa2000.html#EderGP00