Kakalios, James (2005). The Physics of Superheores. New York: Gotham Books/Penguin Group, Inc. ISBN978-1-59240-146-8.
The author, James Kakalios, is a physics professor. Page 250, caption: "Fig. 33. Scene from "Flash #123, where Jay Garrick, the Golden Age Flash, demonstrates the quantum mechanical process known as 'tunneling.' Page 251: There is no doubt how The Flash, both the Golden and Silver Age versions, is able to use his great speed to pass through solid objects, as shown in fig. 33. He is able to increase his kinetic energy to the point where the probability, from the Schrodinger equation, of passing through the wall becomes nearly certain."
