M. Jovanovik, B. Najdenov, and D. Trajanov. Proceedings of the 10th International Conference for Informatics and Information Technology (CIIT 2013)
, page 56--61. Faculty of Computer Science and Engineering, Skopje, (2013)
M. Jovanovik, B. Najdenov, G. Strezoski, and D. Trajanov. New Trends in Database and Information Systems II
, volume 312 of Advances in Intelligent Systems and Computing, Springer, (2015)