>>307
論文で思い出した
https://www.agulin.aoyama.ac.jp/thesis/2016/TB50177613.pdf
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjW66Cf-_b_AhUN0GEKHXecASkQFnoECA4QAQ&url=https%3A%2F%2Fdoshisha.repo.nii.ac.jp%2F%3Faction%3Drepository_action_common_download%26item_id%3D28218%26item_no%3D1%26attribute_id%3D28%26file_no%3D1&usg=AOvVaw3Q1wPPZOxyAU0Ykxxx5xUk&opi=89978449
https://www.takushoku-u.ac.jp/campus_life/files/selected-scholarship-report_2015.pdf