I. Fahrur Rozi, D. Rizky Yunianto, M. Mentari, A. Setiawan, R. Ariyanto, and I. Siradjuddin, “Geo-Sentiment Analysis as a Location-Based Opinion Analysis System on Public Opinion Data about Governor Candidates”, IJET, vol. 7, no. 4.36, pp. 1340–1346, Dec. 2018, doi: 10.14419/ijet.v7i4.36.28983.