==== Reference commits ====
* The M61 model [http://article.gmane.org/gmane.science.nmr.relax.scm/17647]* [http://article.gmane.org/gmane.science.nmr.relax.scm/17648]* [http://article.gmane.org/gmane.science.nmr.relax.scm/17649]* [http://article.gmane.org/gmane.science.nmr.relax.scm/17662]* [http://article.gmane.org/gmane.science.nmr.relax.scm/17663]
=== Comparing to other software ===