R. J. Hunter, M. S. Patterson, R. A. Weersink, J. T. Bruulsema, and J. E. Hayward, "The characterization of a two wavelength time-resolved system for the determination of hemoglobin saturation through comparison with continuous wave and frequency domain systems,"
in Biomedical Optical Spectroscopy and Diagnostics / Therapeutic Laser Applications, E. Sevick-Muraca, J. Izatt, and M. Ediger, eds.,
Vol. 22 of OSA Trends in Optics and Photonics Series
(Optical Society of America, 1998), paper JWA3.