For those who are interested in trying them out self-responsibly or together with a helper, I found [https://www.meta-health.net/tiki-download_file.php?fileId=2212|this article] describing the exercises on page 5 of 9.
This is a scientific article and a rewarding read for those who want to dive deeper into the research on trauma neurobiology!

[https://www.meta-health.net/tiki-download_file.php?fileId=2213|This article]  gives an overview and evaluation of Mind-Body skills for regulating the Autonomic Nervous System and touches on TRE on page 24 of 60.