Zimmermann, Herbert Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society;
http://www.tandfonline.com/doi/abs/10.1080/00268970110099567#aHR0cDovL3d3dy50YW5kZm9ubGluZS5jb20vZG9pL3BkZi8xMC4xMDgwLzAwMjY4OTcwMTEwMDk5NTY3QEBAMA== (Any fulltext)
https://dx.doi.org/10.1080/00268970110099567 (Any fulltext)
Sandström, D., & Zimmermann, H. (2002). Deuterium-carbon multiple-quantum NMR in liquid crystals: polarization transfer and off-magic-angle spinning. Molecular Physics, 100(12), 1935-1940. doi:10.1080/00268970110099567.