著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Luis Guillen and Muhammad Alfian Amrizal and Jiahao Wen and Toru Abe and Takuo Suganuma,An Event-Based Hierarchical Method for Customer Activity Recognition in Retail Stores,,,Springer International Publishing,2020-01-01,,,,https://cir.nii.ac.jp/crid/1870865118119095424,https://doi.org/10.1007/978-3-030-64556-4_21