The [[Relaxation dispersion citation for relax|implementation of the IT99 model in relax]] can be seen in the:
* [http://www.nmr-relax.com/manual/IT99_2_site_CPMG_modelThe_IT99_2_site_CPMG_model.html relax manual],
* [http://www.nmr-relax.com/api/3.1/lib.dispersion.it99-module.html API documentation],
* [http://www.nmr-relax.com/analyses/relaxation_dispersion.html#IT99 relaxation dispersion page of the relax website].