Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Masatoshi Nakamura and Bei Wang and Xingyu Wang,Automatic sleep level evaluation based on conditional probability for day time nap sleep evaluation,2012 ICME International Conference on Complex Medical Engineering (CME),,IEEE,2012-07-01,,,24-27,https://cir.nii.ac.jp/crid/1870865117920611328,https://doi.org/10.1109/iccme.2012.6275664