Authors
Rory Biggs
Department of Mathematics, Rhodes University, PO Box 94, 6140, Grahamstown, South Africa
Claudiu C. Remsing
Department of Mathematics, Rhodes University, PO Box 94, 6140, Grahamstown, South Africa
© 2017 Rory Biggs, Claudiu C. Remsing, published by Ovidius University of Constanta
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.