Schweitzer, Dieter Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
Spiess, Hans W. MPI for Polymer Research, Max Planck Society;
http://www.sciencedirect.com/science/article/pii/0022236474901553/pdf?md5=cd17d3168e09d0998fe8eb7d2bcbc6e3&pid=1-s2.0-0022236474901553-main.pdf (Any fulltext)
https://doi.org/10.1016/0022-2364(74)90155-3 (Any fulltext)
Schweitzer, D., & Spiess, H. W. (1974). Nitrogen-15 NMR of pyridine in high magnetic: Fields. Journal of Magnetic Resonance, 15(3), 529-539. doi:10.1016/0022-2364(74)90155-3.