SOAP4PLC: Web Services for Programmable Logic Controllers. - Markus Mathes; Christoph Stoidner; Steffen Heinzl; Bernd Freisleben (PDP, 2009)

Time-constrained services: a framework for using real-time web services in industrial automation. - Markus Mathes; Christoph Stoidner; Roland Schwarzkopf; Steffen Heinzl; Tim Dörnemann; Helmut Dohmann; Bernd Freisleben (Serv. Oriented Comput. Appl., 2009)

Invoking Web services from programmable logic controllers. - Christoph Stoidner; Bernd Freisleben (ETFA, 2010)