Hammer, H., A. Bai, A. Yazidi, and P. Engelstad. “Building Sentiment Lexicons Applying Graph Theory on Information from Three Norwegian Thesauruses”. Norsk IKT-Konferanse for Forskning Og Utdanning, Oct. 2014, https://www.ntnu.no/ojs/index.php/nikt/article/view/5242.