U. Wolf, M. Wolf, V. Toronov, A. Michalos, L. A. Paunescu, and E. Gratton, "Detecting cerebral functional slow and fast signals by frequency-domain near-infrared spectroscopy using two different sensors,"
in Biomedical Optical Spectroscopy and Diagnostics, T. Li, ed.,
Vol. 38 of OSA Trends in Optics and Photonics
(Optical Society of America, 2000), paper TuF10.