Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) FERRARI M.,Determination of cerebral venous hemoglobin saturation by derivative near infrared spectroscopy,Adv. Exp. Med. Biol.,,,1988,248,,47-53,https://cir.nii.ac.jp/crid/1570291225589002240,