van der Linde, I., E. Kotzé, and G. Dollman. 2016. “A Comparison of Sentiment Analysis Techniques With a Social Media Big Data Set”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt; 35 (1), 2 bladsye. https://doi.org/10.4102/satnt.v35i1.1404.