Le Samouraï, a 1967 French crime drama which influenced Città violenta
Hong Kong director Pang Ho-Cheung's 2001 crime-and-filmmaking comedy You Shoot, I Shoot features Eric Kot as a hitman who idolizes Alain Delon's Jef, dressing like the character, and speaking to him via a Le Samouraï poster in his apartment.
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In the same manner that Jef Costello has a huge ring of keys that enables him to steal any Citroën DS, the hitman Ghost Dog has an electronic "key" to break into luxury cars.
Tim Palmer "Jean-Pierre Melville's LE SAMOURAI", in Phil Powrie (ed.) The Cinema of France, 2006, Wallflower