Receiver-Initiated Communication with ST-II. - Luca Delgrossi; Ralf Guido Herrtwich; Frank Oliver Hoffmann; Sibylle Schaller (Multim. Syst., 1994)

Building a Business Graph System and Network Integration Model Based on BPMN. - Daniel Ritter 001; Jörg Ackermann; Ankur Bhatt; Frank Oliver Hoffmann (BPMN, 2011)