Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) DOI Takayoshi,"Liquefaction of social relationships, solidification of fellowship groups:",Journal of Informatics Education,2432-6321,Japan Association for Informatics Education,2018,1,1,15-22,https://cir.nii.ac.jp/crid/1390282763073070848,https://doi.org/10.24711/jite.1.1_15