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Copyright (c) 2018 Volodymyr Bogush, Sergiy Getmantsev, Konstantin Bogatyirev, Irina Koloskova, Olga Sokol, Oksana Reznichenko

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.