Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Mashallah Mashinchi and Masao Mukaidono,On fuzzy subgroups classification,"明治大学理工学部研究報告 = Research reports, School of Science and Technology, Meiji University",09164944,川崎 : 明治大学理工学部,1993,,9,p31-36,https://cir.nii.ac.jp/crid/1520009410152402816,