1. Workflow Management Coalition: WFMC Reference Model (1995), www.wfmc.org
2. HL7 Organization: Health Level 7 (2000), http://www.hl7.org
3. NEMA and Global Engineering Group: DICOM 3 Standard (1998), http://www.nema.org
4. Radiological Society of North America: IHE Technical Framework 1.1 (2003), http://www.rsna.org/IHE/index.shtml
5. CEN/TC251 Health informatics - Medical data interchange: HIS/RIS-PACS and HIS/RIS Modality Interface - ENV 13939 (2001), http://www.centc251.org/