To learn more about the history of neurofeedback and its scientific foundations go to:

https://www.eeginfo.com/research/

Books

The Body Keeps the Score - Bessel Van Der Kolk

Neurofeedback A gentle therapy to help the brain help itself - Meike Wiedemann, Kirsten Segler

A Symphony in the Brain - Jim Robbins

Restoring the Brain - Ed. Hanno W. Kirk

Neurofeedback in the Treatment of Developmental Trauma - Sebern F Fisher

Related reading

The Pocket Guide to the Polyvagal Theory – Stephen Porges

Healing Trauma – Peter A. Levine

Anchored – Deb Dana

Our Polyvagal World - Stephen Porges and Seth Porges