"Op art 11" has been updated. http://www.psy.ritsumei.ac.jp/~akitaoka/opart11e.html …pic.twitter.com/o00frJZujN
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"Op art 11" has been updated. http://www.psy.ritsumei.ac.jp/~akitaoka/opart11e.html …pic.twitter.com/o00frJZujN