1. Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT). [Gakuryoku Chousa wo Katsuyou Shita Senmonteki na Kadai Bunseki ni Kansuru Kenkyu Chousa (Research survey on professional problem analysis using academic achievement surveys)] [Internet]. 2017 [cited 2021Jul.20]. Available from: https://www.nier.go.jp/17chousa/pdf/17hogosha_factorial_experiment.pdf
2. Horie M. Japan. In de Wit H, Junter F, Howard L, Egron-Polak E editors. Internationalisation of Higher Education. Brussels: European Parliament [Internet]. 2016 [cited 2021Jul.20]:229–239. Available from: http://www.europarl.europa.eu/RegData/etudes/STUD/2015/540370/IPOL_STU(2015)540370_EN.pdf
3. Extending the Stay: Using Community-Based Research and Service Learning to Enhance Short-Term Study Abroad;TL Lewis;Journal of Studies in International Education,2005