Foelling, J., Belov, V., Riedel, D., Schoenle, A., Egner, A., Eggeling, C., et al. (2008). Fluorescence nanoscopy with optical sectioning by two-photon induced molecular switching using continuous-wave lasers. ChemPhysChem, 9(2), 321-326. Retrieved from http://www3.interscience.wiley.com/cgi-bin/fulltext/117885464/PDFSTART.