The [[Relaxation dispersion citation for relax|implementation of the M61 model in relax]] can be seen in the:
* [http://www.nmr-relax.com/manual/M61_2_site_fast_exchange_R1_modelThe_M61_2_site_fast_exchange_R1_rho_model.html relax manual],
* [http://www.nmr-relax.com/api/3.1/lib.dispersion.m61-module.html API documentation],
* [http://www.nmr-relax.com/analyses/relaxation_dispersion.html#M61 relaxation dispersion page of the relax website].