Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yannis Bakos and Erik Brynjolfsson,Bundling and Competition on the Internet,Marketing Science,0732-2399,Institute for Operations Research and the Management Sciences (INFORMS),2000-02,19,1,63-82,https://cir.nii.ac.jp/crid/1362544420942132096,https://doi.org/10.1287/mksc.19.1.63.15182