Here are some reviews that are referred to on the onecryo.com website, quote:
Cryogenic Tempering for Increased Durability and Performance for Racing
"Articles about Deep Cryogenic Tempering have been published in numerous publications such as Performance Racing Industry – July 1998, Modern Application News – March 1998, Winston Cup Scene - December 1997, Motorcycle Magazine - October 1996, National Speed Sport News - September 25th 1996, Cruisin' Style - September 1996, Metlfax - August 1996, Orlando Sentinel, Sports - September 5th 1996, Orlando Sentinel, Business -July 15th 1996, just to name a few. Deep Cryogenic Tempering has also been featured on the Discovery Channel's "NextStep" program by Paul and Phil "the answer guys", episode 83 Fall 1995, as well as on TNN's "Inside NASCAR" December 1997, hosted by Ned Jarret.
http://www.onecryo.com/onecryo/motorsport-brochure2.htm