ZVONČAN, Marek. Technology, Mechanical and Material Approach on Edgechipping in Rotary Ultrasonic Machining of Alumina. 1st ed. Köthen : Hochschule Anhalt, 2013. 92 p. Available on Internet: <https://is.stuba.sk/vv/pub_priloha.pl?id=277099> ISBN 978-3-86011-063-8. M*