Meyer, L., Wildanger, D., Medda, R., Punge, A., Rizzoli, S. O., Donnert, G., et al. (2008). Dual-color STED microscopy at 30-nm focal-plane resolution. Small, 4(8), 1095-1100. Retrieved from http://www3.interscience.wiley.com/cgi-bin/fulltext/121358805/PDFSTART.