Vadim Ermolayev Natalya Keberle Eyck Jentzsch Richard Sohnius Wolf-Ekkehard Matzke Modeling Actions in Dynamic Engineering Design Processes. 127-141 2009 UNISCON http://dx.doi.org/10.1007/978-3-642-01112-2_14 conf/ista/2009 db/conf/ista/uniscon2009.html#ErmolayevKJSM09