Authors
Dorina Răducanu
Faculty of Mathematics and Computer Science, Transilvania University of Braşov, Bdul Iuliu Maniu 50, 500091, Braşov, Romania
© 2017 Dorina Răducanu, published by Ovidius University of Constanta
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.