Jonathan S Farley. "Edmund Cooper bibliography"(PDF). Archived from the original(PDF) on 15 September 2012. Retrieved 28 September 2017. page 4, Short Stories "Brain Child, The : The Saturday Evening Post (as 'The Invisible Boy'); 23 June 1956"; page 11, Filmography "Invisible Boy, The : Brain Child, The: Herman Hoffman; USA; 1957", "O .B.N. in arrivo : Death Watch: part of series ' Racconti di fantascienza di Blasetti, I':Alessandro Blasetti; Italy; 1978"
Jonathan S Farley. "Edmund Cooper bibliography"(PDF). Archived from the original(PDF) on 15 September 2012. Retrieved 28 September 2017. page 4, Short Stories "Brain Child, The : The Saturday Evening Post (as 'The Invisible Boy'); 23 June 1956"; page 11, Filmography "Invisible Boy, The : Brain Child, The: Herman Hoffman; USA; 1957", "O .B.N. in arrivo : Death Watch: part of series ' Racconti di fantascienza di Blasetti, I':Alessandro Blasetti; Italy; 1978"