1. Data provided (2015) by Division of Management Information Systems, University of Johannesburg.
2. Dorina Ionescu, (2015) Vera Tritkova and Cristina Popa Statistic data collection, Mechanical Engineering Technology Department, University of Johannesburg.
3. Felder, R.M. and others, A longitudinal study of Engineering student performance and retention II. Rural/Urban student differences, Department of Chemical Engineering North Carolina State University, Journal of “Engineering Education” published by American Society for Eng. Education, July 1994, yol.83, No.3. p.209.
4. Ionescu, D & Buisson-Street, Jane (2005). Toward a strategy for engineering education in under-privileged communities; The 13th.
5. International Conference of Women Engineers and Scientists; August 26-29, 2005 Ewha Women's University, Seoul, South Korea.