Kleynhans, Waldo; Olivier, Jan Corne; Wessels, K.J. (Konrad); Van den Bergh, Frans; Salmon, Brian Paxton; Steenkamp, Karen C.(Institute of Electrical and Electronics Engineers, 2009)
Marx-Pienaar, Nadene Johanna Maria Magdalena; Erasmus, Alet C. (Aletta Catharina)(South African Association of Family Ecology and Consumer Sciences, 2006)