Lopez, D. Films by genre, c1993 (Caper film (Big-caper film; heist film))

Oakey, V. Dict. of film and television terms, c1983 (caper film; a motion picture in which the plot revolves around a major theft or other illegal enterprise, usually a highly imaginative and complicated maneuver; dev. from the point of view of the lawbreakers)

Moving image genre-form guide online, February 11, 2008: (Caper; RT: Thriller; Crime)

Films that feature the execution of a particularly difficult undertaking, often questionable or illegal, the success of which depends on skill and careful planning.