1. F. Werke, Poligonkötések (Polygon Joints), Müszaki Könyvkiadó, Budapest, 16t, 1967, p. 108 (in Hungarian).
2. O. Szabó, Final machining of the polygon surfaces of modern machine structural joints by honing and superfinishing, in: Proceedings of the Fourth Tool and Toolmaterial Conference, Miskolc-Egyetemváros (Offprint), 1978, p. 12 (in Hungarian).
3. O. Szabó, Research Experiences of the NC-cutting of Roll Surfaces of Various Lead Curve and Experiences of its Superhard Abrasive Finishing, Gépgyártástechnológia (Production), Budapest, August 26, 1986, p. 373 (in Hungarian).
4. O. Szabó, Finishing of polygon surface regarding profiling honing of bores, in: Proceedings of the Eighth International Conference on Tools, Miskolc, 1993, pp. 343–348.