John Denver

Respiratory sinus arrhythmia and auditory processing in autism: modifiable deficits of an integrated social engagement system?

Gregory F. Lewis, Keri J. Heilman, Matthew V Macellaio, 2013, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

Electroencephalogram and heart rate regulation to familiar and unfamiliar people in children with autism spectrum disorders.

Stephen W Porges, S. Porges, Damon G. Lamb, 2009, Child development.