M. A. Franceschini, L. A. Paunescu, S. Fantini, S. Pratesi, J. S. Maier, G. P. Donzelli, and E. Gratton, "Frequency-domain optical measurements in vitro on two- and three-layerd tissue-like phantoms, and in vivo on infant heads,"
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 ASuB3.