F. Gai, K. C. Hasson, J. C. McDonald, and P. A. Anfinrud, "The primary events in the photoisomerization of retinal in bacteriorhodopsin: probing the reaction pathway with femtosecond spectroscopy,"
in Quantum Electronics and Laser Science Conference, J. Bokor, R. Slusher, P. Bucksbaum, and R. Falcone, eds.,
Vol. 12 of OSA Technical Digest
(Optical Society of America, 1997), paper QThI2.