Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kurokawa Masayuki and Yoshida Toshikazu,The effects of peer presence and personal permeability of the group on learning within the group,THE JAPANESE JOURNAL OF EXPERIMENTAL SOCIAL PSYCHOLOGY,03877973,The Japanese Group Dynamics Association,2009,49,1,45-57,https://cir.nii.ac.jp/crid/1390001204316832512,https://doi.org/10.2130/jjesp.49.45