Citation

Doddrell DM Kleinschmidt KM (1980) Nuclear spin-lattice relaxation in a multi-spin system. A spin 1/2 particle dipolar coupled to a spin 1 and spin 3/2 particle. ¹³C spin relaxation in urea. Australian Journal of Chemistry 33, 2571-2583.

https://doi.org/10.1071/CH9802571