found: Work cat: Anile, A. Dizionario del cinema immaginario, 2019:(The first catalog of "films within films," fictitious movies within the structure of a real film) (DLC)2019371194
found: Wikipedia WWW site, viewed May 20, 2020:English, entry List of films featuring fictional films (also called films within films)
found: Internet Movie Database WWW site, viewed May 20, 2020:Top news, 18 December 2012, 10 Greatest Films Within Films (films about filmmaking)
found: The New Yorker WWW site, viewed May 20, 2020:article by Richard Brody: "'Broken City' and Films Within Films," Jan. 18, 2013 issue ( "there is one scene, a literal movie within the movie ...")
