Ellinghaus, P.; Venter, Petrus Johannes; Du Plessis, Monuko; Rademeyer, Pieter; Bogalecki, Alfons Willi(South African Institute of Electrical Engineers, 2010-03)
Mayhew-Ridgers, Gordon; Van Jaarsveld, Paul A.; Odendaal, J.W. (Johann Wilhelm); Joubert, Johan(Institute of Electrical and Electronics Engineers, 2014)