 Addio e Ritorno1996 · Writer | Writer |
 Arizona Road1991 · Writer | Writer |
 Panama Sugar1990 · Screenplay | Screenplay |
 The Last Match1990 · Writer | Writer |
 Cobra Mission 21989 · Writer | Writer |
 The Sweet House of Horrors1989 · Screenplay | Screenplay |
 Phantom of Death1988 · Screenplay | Screenplay |
 Cobra Mission1986 · Writer | Writer |
 Miami Golem1985 · Screenplay | Screenplay |
 Formula for a Murder1985 · Writer | Writer |
 Murder-Rock: Dancing Death1984 · Screenplay | Screenplay |
 Raiders of Atlantis1983 · Screenplay | Screenplay |
 I camionisti1982 · Screenplay | Screenplay |
 The New York Ripper1982 · Screenplay | Screenplay |
 Desirable Teacher 21982 · Screenplay | Screenplay |
 Desirable Teacher1981 · Screenplay | Screenplay |
 The Last Shark1981 · Screenplay | Screenplay |
 House on the Edge of the Park1980 · Writer | Writer |
 I'm for the Hippopotamus1979 · Screenplay | Screenplay |
 From Corleone to Brooklyn1979 · Screenplay | Screenplay |
 Weapons of Death1977 · Screenplay | Screenplay |
 A Special Cop in Action1976 · Screenplay | Screenplay |
 Violent Naples1976 · Screenplay | Screenplay |
 Rome, the Other Face of Violence1976 · Screenplay | Screenplay |
 Shadows in an Empty Room1976 · Screenplay | Screenplay |
 Hallucination Strip1975 · Screenplay | Screenplay |
 Syndicate Sadists1975 · Screenplay | Screenplay |
 Violent Rome1975 · Screenplay | Screenplay |
 Five Women for the Killer1974 · Screenplay | Screenplay |
 The Antichrist1974 · Writer | Writer |
 The Counsellor1973 · Screenplay | Screenplay |
 High Crime1973 · Writer | Writer |
 The Killer Is on the Phone1972 · Writer | Writer |
 The Man with Icy Eyes1971 · Writer | Writer |
 Eagles Over London1969 · Screenplay | Screenplay |
 Carnal Circuit1969 · Screenplay | Screenplay |
 Spy Pit1967 · Screenplay | Screenplay |
 Dirty Heroes1967 · Writer | Writer |
 Argoman the Fantastic Superman1967 · Writer | Writer |
 Django Shoots First1966 · Screenplay | Screenplay |
 $100,000 for Ringo1965 · Screenplay | Screenplay |
 The Revolt of the Seven1964 · Writer | Writer |
