Authors
Ivan Garvanov
University of Library Studies and Information Technologies, Sofia, Bulgaria
© 2019 Hristo Kabakchiev, Ivan Garvanov, Vera Behar, Dorina Kabakchieva, Kalin Kabakchiev, Hermann Rohling, Krzysztof Kulpa, Alexander Yarovoy, 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.