1. Bjoerke, O. and Myklebust, O. 1992. “IMPPACT ESPRIT 2165 Integrated Modelling of Products and Processes Using Advanced Computer Technologies”. Trondheim: Tapir.
2. DIN 8589. 1981. “Fertigungsverfahren Spanen; Einordnung, Unterteilung, Begriffe”. Berlin: Beuth.
3. ESPRIT-IMS. “Project # 29708 STEP-NC”. Available online at:http://www.step-nc.org/