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3. L. Butnar, N. Pop, H. Cioban (2009). Researches Concerning Friction Influence on Material Flow in Inverse Extrusion of Toothed Gears, Annals of DAAAM for 2009 & Proceedings of the 20th International DAAAM Symposium, 25-28th November 2009, Vienna, Austria, ISSN 1726-9679 ISBN 978-3-901509-70-4, Katalinic, B. (Ed.), pp. 0797-0798, Published by DAAAM International Vienna, Vienna.
4. N. Ghiban, G. Chelu, N. Serban, B. Ghiban (2008). Extrusion Process Modelling of the Non-Rounded Products: a 2-D Approach, Annals of DAAAM for 2008 & Proceedings of the 19th International DAAAM Symposium, 22-25th October 2008, Trnava, Slovakia, ISSN 1726-9679 ISBN 978-3-901509-68-1, Katalinic, B. (Ed.), pp. 0517-0518, Published by DAAAM International Vienna, Vienna.
5. S. Takakuwa: A Perspective on Manufacturing and Environmental Management, Chapter 09 in DAAAM International Scientific Book 2013, pp. 213-234, B. Katalinic & Z. Tekic (Eds.), Published by DAAAM International, Vienna, Austria.