Etzkorn, M., Matell, S., Andronesi, O., Seidel, K., Engelhard, M., & Baldus, M. (2007). Secondary structure, dynamics, and topology of a seven-helix receptor in native membranes, studied by solid-state NMR spectroscopy. Angewandte Chemie International Edition, 46(3), 459-462. Retrieved from http://www3.interscience.wiley.com/cgi-bin/fulltext/113374446/HTMLSTART.