Authors
N. Rakhsh-Khorshid
Department of Mathematics, Yazd University,, Yazd, Iran
© 2017 B. Davvaz, N. Rakhsh-Khorshid, K. P. Shum, published by Ovidius University of Constanta
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.