 Anita Garibaldi2012 · Writer | Writer |
 General della Rovere2011 · Screenplay | Screenplay |
 Ferrari2003 · Writer | Writer |
 La guerra è finita2002 · Screenplay | Screenplay |
 Kidnapping – Ein Vater schlägt zurück1998 · Screenplay | Screenplay |
 Incompreso1998 · Writer | Writer |
 Everybody's Fine1990 · Writer | Writer |
 The Mask of Satan1990 · Screenplay | Screenplay |
 Eyewitness1990 · Screenplay | Screenplay |
 I padroni dell'estate1987 · Screenplay | Screenplay |
 Skipper1987 · Writer | Writer |
 An Australian in Rome1987 · Screenplay | Screenplay |
 The Professor1986 · Screenplay | Screenplay |
 La ragazza dei lillà1986 · Writer | Writer |
 Blastfighter1984 · Writer | Writer |
 Holy Cow1982 · Screenplay | Screenplay |
 Un centesimo di secondo1981 · Screenplay | Screenplay |
 Car Crash1981 · Writer | Writer |
 Speed Driver1980 · Screenplay | Screenplay |
 The Warning1980 · Screenplay | Screenplay |
 Pumaman1980 · Screenplay | Screenplay |
 Corleone1978 · Screenplay | Screenplay |
 Break Up1978 · Screenplay | Screenplay |
 The Payoff1978 · Screenplay | Screenplay |
 The Heroin Busters1977 · Screenplay | Screenplay |
 The Big Racket1976 · Screenplay | Screenplay |
 The Con Artists1976 · Screenplay | Screenplay |
 Go Gorilla, Go!1975 · Writer | Writer |
 Order to Kill1975 · Writer | Writer |
 Street Law1974 · Writer | Writer |
 War Goddess1973 · Screenplay | Screenplay |
 Revolver1973 · Screenplay | Screenplay |
 The Valdez Horses1973 · Screenplay | Screenplay |
 The Police Serve the Citizens?1973 · Screenplay | Screenplay |
 Hospitals: The White Mafia1973 · Screenplay | Screenplay |
 The Sicilian Checkmate1972 · Screenplay | Screenplay |
 Don't Turn the Other Cheek1971 · Screenplay | Screenplay |
 The Case Is Closed, Forget It1971 · Screenplay | Screenplay |
 The Man with Icy Eyes1971 · Writer | Writer |
 Compañeros1970 · Screenplay | Screenplay |
 A Brief Season1969 · Writer | Writer |
 The Tough and the Mighty1969 · Screenplay | Screenplay |
 A Bullet for Rommel1969 · Writer | Writer |
 Bandits in Rome1968 · Screenplay | Screenplay |
 The Violent Four1968 · Screenplay | Screenplay |
