poom.kum@kmutt.ac.th
sarwarswati@gmail.com
mbz.math@gmail.com
© 2016 Poom Kumam, Muhammad Sarwar, Mian Bahadur Zada, published by University of Silesia in Katowice, Institute of MathematicsThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.