Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Motoaki Mouri and Arao Funase and Ichi Takumi,Global signal elimination from environmental electromagnetic signals by nonnegative matrix factorization,信号処理 = Journal of signal processing,13426230,[東京] : [信号処理学会],2010-11,14,6,415-425,https://cir.nii.ac.jp/crid/1522262179950213632,