Media type: Electronic Conference Proceeding Title: Single-molecule detection by two-photon excitation of fluorescence Contributor: Zander, Christoph; Brand, Leif; Eggeling, C.; Drexhage, Karl-Heinz; Seidel, Claus A. M. Published: SPIE, 1997 Published in: SPIE Proceedings (1997) Extent: Language: Not determined DOI: 10.1117/12.273568 ISSN: 0277-786X Origination: Footnote: