Kastner, B., Fischer, N., Golas, M. M., Sander, B., Dube, P., Boehringer, D., Hartmuth, K., Deckert, J., Hauer, F., Wolf, E., Uchtenhagen, H., Urlaub, H., Herzog, F., Peters, J. M., Porschke, D., Luehrmann, R., & Stark, H. (2008). GraFix: sample preparation for single-particle electron cryomicroscopy. Nature Methods, 5(1), 53-55. Retrieved from http://www.nature.com/nmeth/journal/v5/n1/pdf/nmeth1139.pdf.