* [http://wiki.nmr-relax.com/Relax_3.3.8 Official release notes on the relax wiki].
* [https://gna.org/forum/forum.php?forum_id=2495 2496 Gna! news item].
* [http://article.gmane.org/gmane.science.nmr.relax.announce/67 Gmane mailing list archive].
* [http://www.mail-archive.com/relax-announce%40gna.org/msg00057.html The Mail Archive].