H. J. Eichler, R. Elschner, B. Jähnig, and M. Knepper, "Femtosecond absorption spectroscopy on chlorophyll and photosystem II of higher plants,"
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 QThG1.