Geisler, C., Schoenle, A., von Middendorff, C., Bock, H., Eggeling, C., Egner, A., et al. (2007). Resolution of λ /10 in fluorescence microscopy using fast single molecule photo-switching. Applied Physics A, 88(2), 223-226. Retrieved from http://www.springerlink.com/content/ct8v2635gp54476r/fulltext.pdf.