Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sakai Osamu and Namiki Yuji,Development of Diagnostic Method for Servitization on Small Businesses:Assessment of Revenue Model with Subscription,Journal of Japan Management Diagnosis Association,1883-4930,Japan Management Diagnosis Association,2021,21,0,7-10,https://cir.nii.ac.jp/crid/1390852735461698304,https://doi.org/10.11287/jmda.21.7