Takamatsu, K., Y. Kozaki, A. Kishida, K. Bannaka, K. Mitsunari, and Y. Nakata. “ANALYZING STUDENTS’ COURSE EVALUATIONS USING TEXT MINING: VISUALIZATION OF OPEN-ENDED RESPONSES IN A CO-OCCURRENCE NETWORK”. PEOPLE: International Journal of Social Sciences, vol. 4, no. 3, Nov. 2018, pp. 142-53, doi:10.20319/pijss.2018.43.142153.