Taiwo, A.
Alakoya, T. O.
Mewomo, O. T.
Funding for this research was provided by:
International Mathematical Union (IMU-BGF-20191001)
National Research Foundation (NRF), South Africa (119903)
Article History
Received: 7 December 2019
Accepted: 13 April 2020
First Online: 10 May 2020