Authors
Iliya Bouyukliev
Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, Bulgaria
Maya Hristova
Faculty of Mathematics and Informatics, Veliko Tarnovo University, Veliko Tarnovo, Bulgaria
© 2018 Iliya Bouyukliev, Maya Hristova, published by Bulgarian Academy of Sciences, Institute of Information and Communication Technologies
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.