Authors
Anthony To-Ming Lau
Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Canada
Yong Zhang
Department of Mathematics, University of Manitoba, Winnipeg, Canada
© 2019 Anthony To-Ming Lau, Yong Zhang, published by Pedagogical University of Cracow
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.