Marktspiegel Customer Relationship ManagementStefan Helmke, Wilhelm Dangelmaier · First published 2013Open the Tome
Praxis des Customer Relationship ManagementMatthias Uebel, Stefan Helmke, Wilhelm Dangelmaier · First published 2013Open the Tome
Managementorientiertes IT-Controlling und IT-GovernanceStefan Helmke, Matthias Uebel · First published 2012Open the Tome
Praxis des Customer Relationship ManagementMatthias F. Uebel Stefan Helmke · First published 2012Open the Tome
Marktspiegel Customer Relationship ManagemenglishtStefan Helmke, Wilhelm Dangelmaier · First published 2001Open the Tome
Über nilpotente Bahnen, einfache Singularitäten und modular invariante PartitionsfunktionenStefan Helmke · First published 1994Open the Tome
