Tehnika 2014, vol. 69, iss. 1, pp. 19-23 Radović Ivana M., Dukali Radman A., Yerro Omer M., Stojanović Dušica B. , Uskoković Petar S., Radojević Vesna J., Aleksić Radoslav R. University of Belgrade, Faculty of Technology and Metallurgy. READ THE PUBLICATION