Authors
Sorin Rădulescu
Institute of Mathematical Statistics and Applied Mathematics, Bucharest, Romania
Marius Drăgan
Department of Mathematics, “Mircea cel Bătrân” Technical College, Bucharest, Romania
© 2020 Sorin Rădulescu, Marius Drăgan, Mihály Bencze, published by Sapientia Hungarian University of Transylvania
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.