Bello-Orgaz, G., H. Menéndez, S. Okazaki, and D. Camacho. “Combining Social-Based Data Mining Techniques To Extract Collective Trends From Twitter”. Malaysian Journal of Computer Science, vol. 27, no. 2, June 2014, pp. 95-111, https://malindojournal.um.edu.my/index.php/MJCS/article/view/6797.