Ibrahim, K., B. Ranaivo-Malançon, T. Lim, and Y.-N. Cheah. “Evaluating Layout and Clustering Algorithms for Visualizing Named Entity Graph”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 2-10, Sept. 2017, pp. 47-55, https://jtec.utem.edu.my/jtec/article/view/2705.