R. Cubeddu, A. Pifferi, P. Taroni, A. Torricelli, and G. Valentini, "In vivo absorption and scattering spectra of human tissues in the read and near infrared,"
in Advances in Optical Imaging and Photon Migration, J. Fujimoto and M. Patterson, eds.,
Vol. 21 of OSA Trends in Optics and Photonics
(Optical Society of America, 1998), paper AWC5.