Greeff, F., & de Wet, L. (2013). The combination of fisiological and tradisional user test techniques to evaluate social networks on various technological platforms. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt;, 32(1), 1 bladsy. https://doi.org/10.4102/satnt.v32i1.411