[1] [CITE[19-1-1B-03.pdf]], [TIME[2019-12-04T16:30:28.000Z]], [TIME[2021-11-23T06:44:39.682Z]] <http://s-ir.sap.hokkyodai.ac.jp/dspace/bitstream/123456789/4339/1/19-1-1B-03.pdf>