Šuškevičienė, Ilona, et al. “Near-Infrared Spectroscopy in Newborns and Infants under General Anesthesia”. Acta Medica Lituanica, vol. 19, no. 3, Oct. 2012, pp. 232-6, https://doi.org/10.6001/actamedica.v19i3.2457.