Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Watanabe Nobuyuki and Akiyama Yoshiharu and Sugiyama Akira,R&D Efforts to Reduce the Burden of ICT Services on the Environment,NTT Technical Review,2436-5327,NTT Science and Core Technology Laboratory Group,2015-03,13,3,6-9,https://cir.nii.ac.jp/crid/1390299218299633536,https://doi.org/10.53829/ntr201503fa1