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Lippitz, M., W. Erker, H. Decker, K. E. van Holde, and T. Basché. Two-photon Excitation Microscopy of Tryptophan-containing Proteins. The National Academy of Sciences, 2002.

Lippitz, M., et al. Two-photon Excitation Microscopy of Tryptophan-containing Proteins. The National Academy of Sciences, 2002.