Research Article
Andrej Šorgo, Nataša Pipenbaher, Slavica Šimić Šašić, Pavol Prokop, Milan Kubiatko, Nika Golob, Mehmet Erdogan, Iztok Tomažič, Martin Bilek, Jana Fančovičova, Vincentas Lamanauskas, Muhammet Usak
EURASIA J Math Sci Tech Ed, Volume 11, Issue 4, pp. 713-723
https://doi.org/10.12973/eurasia.2015.1379a