Haeberlen, Ulrich Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
https://www.sciencedirect.com/science/article/pii/002223648790148X/pdf?md5=13794d3da36b71850374e1acc1cc5e67&pid=1-s2.0-002223648790148X-main.pdf (Any fulltext)
https://doi.org/10.1016/0022-2364(87)90148-X (Any fulltext)
Keller, A., Benz, S., & Haeberlen, U. (1987). NMR lineshape analysis of exchanging systems. Mapping onto harmonic oscillator equations; A new analytically solvable case and experiments on K2C2O2·D2O. Journal of Magnetic Resonance, 72(3), 434-448. doi:10.1016/0022-2364(87)90148-X.