About this article
Published Online: Nov 05, 2014
Page range: 61 - 72
Received: Apr 09, 2014
DOI: https://doi.org/10.2478/ausm-2014-0018
Keywords
© 2014
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Szántó, Csaba
Babeş-Bolyai University, Cluj-Napoca Faculty of Mathematics and Computer Science,Cluj-Napoca, Romania