Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Okamoto Masaya and Serikawa Seiichi,Verification of Positioning Free Contact Type Charger using Drone,Proceedings of IIAE Annual Conference,2424-211X,The Institute of Industrial Applications Engineers,2019,2019,0,9-10,https://cir.nii.ac.jp/crid/1390285300182309760,https://doi.org/10.12792/iiae2019.006