About this article
Published Online: Sep 02, 2017
Page range: 115 - 118
Received: Jul 12, 2016
Accepted: Jan 11, 2017
DOI: https://doi.org/10.1515/awutm-2017-0008
Keywords
© Annals of West University of Timisoara - Mathematics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Mavecha, Sukrawan
Department of Mathematics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang,Bangkok, Thailand