자료출처: https://www.ncub.co.uk/wp-content/uploads/2015/05/state-of-the-relationship-report-2015-WEB-v2-reduced194.pdf, https://www.rwth-aachen.de/go/id/a/?lidx=1, https://www.surrey.ac.uk/, https://www.ynu.
ac.jp/
내용문의: 나미라 mrra@mmu.ac.kr