Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) T. Yamakawa and M. Hongo and A. Ambia and T. Takemae,Breath Timing Monitoring Using Spring Coil,2009 International Association of Computer Science and Information Technology - Spring Conference,,IEEE,2009-01-01,,,480-482,https://cir.nii.ac.jp/crid/1870020693356099584,https://doi.org/10.1109/iacsit-sc.2009.72