| La Maîtresse du vampire | 1960 | Screenplay |
| Parlez-moi d'amour | 1960 | Screenplay |
| Rocco e le sorelle | 1961 | Screenplay |
| Le Monstre aux filles | 1961 | Writer |
| Pesci d'oro e bikini d'argento | 1961 | Screenplay |
| Aux mains des SS | 1962 | Writer |
| L'Effroyable Secret du Dr. Hichcock | 1962 | Writer |
| Seul contre Rome | 1962 | Screenplay |
| Persée l'invincible | 1963 | Screenplay |
| Divorzio alla siciliana | 1963 | Screenplay |
| La Vierge de Nuremberg | 1963 | Screenplay |
| Le Corps et le Fouet | 1963 | Screenplay |
| Golia e il cavaliere mascherato | 1963 | Writer |
| Scandali... nudi | 1963 | Screenplay |
| La Crypte du Vampire | 1964 | Screenplay |
| L'orgie des vampires | 1964 | Screenplay |
| Les géants de Rome | 1964 | Screenplay |
| La vengeance de Spartacus | 1964 | Writer |
| LES ESPIONS MEURENT A BEYROUTH | 1965 | Screenplay |
| Libido | 1965 | Screenplay |
| Libido | 1965 | Producer |
| Cifrato speciale | 1966 | Writer |
| A 077, sfida ai killers | 1966 | Screenplay |
| Les nuits de l'épouvante | 1966 | Screenplay |
| Furia a Marrakech | 1966 | Writer |
| Delitto quasi perfetto | 1966 | Screenplay |
| Le carnaval des barbouzes | 1966 | Screenplay |
| Arizona Colt | 1966 | Screenplay |
| Duello nel mondo | 1966 | Screenplay |
| Les Colts de la violence | 1966 | Writer |
| Troppo per vivere... poco per morire | 1967 | Screenplay |
| Le Temps des vautours | 1967 | Screenplay |
| Flashman | 1967 | Writer |
| Le jour de la haine | 1967 | Screenplay |
| Le dernier jour de la colère | 1967 | Screenplay |
| L'adorable corps de Deborah | 1968 | Writer |
| Django, Ne Prie Pas | 1968 | Screenplay |
| Cin cin... cianuro | 1968 | Screenplay |
| Uno di più all'inferno | 1968 | Screenplay |
| Diamonds for Breakfast | 1968 | Writer |
| La Bataille d'El Alamein | 1969 | Screenplay |
| Sept hommes pour Tobrouk | 1969 | Writer |
| Si douces... si perverses ! | 1969 | Screenplay |
| Photo interdite d'une bourgeoise | 1970 | Screenplay |
| Une traînée de poudre, les pistoleros arrivent ! | 1970 | Screenplay |
| L'Étrange vice de madame Wardh | 1971 | Screenplay |
| La lunga spiaggia fredda | 1971 | Writer |
| Plus Venimeux que le Cobra | 1971 | Screenplay |
| La queue du scorpion | 1971 | Screenplay |
| La mort marche en talons hauts - Nuits d'amour et d'épouvante | 1971 | Screenplay |
| Toutes les couleurs du vice | 1972 | Screenplay |
| Un dólar de recompensa | 1972 | Screenplay |
| Les rendez-vous de Satan | 1972 | Screenplay |
| Ton Vice est une chambre close dont moi seul ai la clé | 1972 | Screenplay |
| La mort caresse à minuit | 1972 | Screenplay |
| Une raison pour vivre, une raison pour mourir | 1972 | Screenplay |
| Le Grand Duel | 1972 | Screenplay |
| Torso | 1973 | Screenplay |
| Rue de la violence | 1973 | Screenplay |
| L'emprise des sens | 1973 | Screenplay |
| Mon nom est Personne | 1973 | Screenplay |
| La Rançon de la Peur | 1974 | Screenplay |
| L'Homme sans mémoire | 1974 | Screenplay |
| La pupa del gangster | 1975 | Writer |
| La città gioca d'azzardo | 1975 | Screenplay |
| Mort suspecte d’une mineure | 1975 | Screenplay |
| Colère noire | 1975 | Screenplay |
| Les Furieux | 1975 | Screenplay |
| Un Génie, deux associés, une cloche | 1975 | Screenplay |
| Le Cynique, l'infâme, le violent | 1977 | Screenplay |
| Les Requins du désert | 1977 | Screenplay |
| SOS Concorde | 1979 | Screenplay |
| Le Dieu Alligator | 1979 | Writer |
| Je suis en train d'un yacht | 1980 | Screenplay |
| Notturno con grida | 1981 | Writer |
| Crimes au cimetière étrusque | 1982 | Screenplay |
| 2019 après la chute de New York | 1983 | Screenplay |
| L'assassino è ancora tra noi | 1986 | Screenplay |
| Provare per credere | 1987 | Writer |
| The Shatterer | 1987 | Screenplay |
| Stradivari | 1988 | Screenplay |
| Jiboa, il sentiero dei diamanti | 1989 | Writer |
| Casablanca Express | 1989 | Screenplay |
| Il giorno del giudizio | 1994 | Writer |
