Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Tamura Yasuhisa,Current Situation of e-Textbook and EDUPUB Specification,Transactions of Japanese Society for Information and Systems in Education,13414135,Japanese Society for Information and Systems in Education,2015-04-01,32,2,148-159,https://cir.nii.ac.jp/crid/1390001205514229120,https://doi.org/10.14926/jsise.32.148