1. Niemöller, J., Fikouras, I., de Rooij, F., Klostermann, L., Stringer, U., Olsson, U.: Ericsson Composition Engine – Next-generation IN. Ericsson Review (February 2009), http://www.ericsson.com/ericsson/corpinfo/publications/review/2009_02/files/NGIN.pdf
2. OASIS: Web Services Business Process Execution Language v. 2.0 (April 2007)
3. ActiveBPEL community, http://www.activevos.com/community-open-source.php
4. Microsoft: Windows Workflow Foundation, http://msdn.microsoft.com/en-us/netframework/aa663328.aspx
5. Oracle: Oracle BPEL Process Manager, http://www.oracle.com/technology/products/ias/bpel/index.html