| L'ebreo errante | 1948 | Screenplay |
| Il brigante Musolino | 1950 | Screenplay |
| Trahison | 1951 | Screenplay |
| Amo un assassino | 1952 | Screenplay |
| Vacances avec gangsters | 1952 | Screenplay |
| Tormento del passato | 1952 | Screenplay |
| Sensualità | 1952 | Screenplay |
| Totò e i re di Roma | 1952 | Screenplay |
| I tre corsari | 1952 | Screenplay |
| I sette dell'orsa maggiore | 1953 | Writer |
| Jolanda la figlia del corsaro nero | 1953 | Screenplay |
| La Louve de Calabre | 1953 | Screenplay |
| La nave delle donne maledette | 1953 | Writer |
| Siluri umani | 1954 | Screenplay |
| La grande speranza | 1954 | Screenplay |
| Mambo | 1954 | Writer |
| Ulysse | 1954 | Screenplay |
| D'Artagnan, chevalier de la reine | 1954 | Writer |
| Attila, fléau de Dieu | 1954 | Screenplay |
| Sémiramis, esclave et reine | 1954 | Screenplay |
| Divisione Folgore | 1954 | Screenplay |
| Par-dessus les moulins | 1955 | Screenplay |
| La risaia | 1956 | Screenplay |
| Guerre et Paix | 1956 | Screenplay |
| Suor Letizia | 1956 | Screenplay |
| Le disque rouge | 1956 | Screenplay |
| Londra chiama Polo Nord | 1956 | Screenplay |
| Orlando e i Paladini di Francia | 1956 | Writer |
| Le Cri | 1957 | Screenplay |
| Un dénommé Squarcio | 1957 | Screenplay |
| La ragazza del palio | 1957 | Screenplay |
| Les Travaux d'Hercule | 1958 | Screenplay |
| È arrivata la parigina | 1958 | Screenplay |
| Pezzo, capopezzo e capitano | 1958 | Writer |
| La Révolte des gladiateurs | 1958 | Screenplay |
| Soledad | 1959 | Writer |
| Hercule et la Reine de Lydie | 1959 | Screenplay |
| Esterina | 1959 | Screenplay |
| Le Secret du chevalier d'Éon | 1959 | Writer |
| Meurtre à l'italienne | 1959 | Screenplay |
| Les derniers jours de Pompéi | 1959 | Writer |
| Les Légions de Cléopâtre | 1959 | Screenplay |
| La Bataille de Marathon | 1959 | Screenplay |
| Carthage en flammes | 1960 | Screenplay |
| Messaline | 1960 | Screenplay |
| La Charge de Syracuse | 1960 | Screenplay |
| Le Masque du démon | 1960 | Screenplay |
| La Rue des amours faciles | 1960 | Screenplay |
| Saffo - Venere di Lesbo | 1960 | Writer |
| Le vainqueur de l'espace | 1960 | Writer |
| La Reine des Amazones | 1960 | Screenplay |
| La Longue Nuit de 43 | 1960 | Screenplay |
| Les Dauphins | 1960 | Screenplay |
| Esther et le roi | 1960 | Writer |
| Le Géant de Thessalie | 1960 | Screenplay |
| Constantin le Grand | 1961 | Screenplay |
| Odissea nuda | 1961 | Writer |
| L'Imprévu | 1961 | Writer |
| Tiro al piccione | 1961 | Screenplay |
| Le Colosse de Rhodes | 1961 | Screenplay |
| L'Esclave du pharaon | 1961 | Screenplay |
| Orazi e Curiazi | 1961 | Screenplay |
| La Planète des hommes perdus | 1961 | Writer |
| Romulus et Rémus | 1961 | Screenplay |
| Divorce à l'italienne | 1961 | Screenplay |
| Madame Sans-Gêne | 1961 | Screenplay |
| Taras Bulba, il cosacco | 1962 | Writer |
| Maciste en enfer | 1962 | Writer |
| Marco Polo | 1962 | Writer |
| Les Titans | 1962 | Screenplay |
| Le fils de Tarass Boulba | 1962 | Writer |
| La leggenda di Fra Diavolo | 1962 | Screenplay |
| Les Don Juan de la Côte d'Azur | 1962 | Screenplay |
| La Fille qui en savait trop | 1963 | Screenplay |
| L'attico | 1963 | Writer |
| Le gladiatrici | 1963 | Producer |
| Italiani brava gente | 1964 | Screenplay |
| L'Idea Fissa | 1964 | Writer |
| Meurtre à l'italienne | 1965 | Screenplay |
| Guerre secrète | 1965 | Writer |
| Un amore | 1965 | Screenplay |
| Play-Boy Party | 1965 | Screenplay |
| Rembrandt 7 antwortet nicht | 1966 | Writer |
| La battaglia dei Mods | 1966 | Screenplay |
| Opération San Gennaro | 1966 | Screenplay |
| Une rose pour tous | 1967 | Writer |
| Per amore... per magia... | 1967 | Screenplay |
| Fai in fretta ad uccidermi... ho freddo! | 1967 | Screenplay |
| Operazione San Pietro | 1967 | Screenplay |
| La Bataille de San Sebastian | 1968 | Writer |
| Tenderly | 1968 | Screenplay |
| Mieux veuve que déshonorée | 1968 | Writer |
| I bastardi | 1968 | Writer |
| La pecora nera | 1968 | Screenplay |
| Le Temps des amants | 1968 | Screenplay |
| Colpo di stato | 1969 | Screenplay |
| La Tente rouge | 1969 | Screenplay |
| Barbe-Bleue | 1972 | Writer |
| Daniele e Maria | 1973 | Writer |
| Les Dix Derniers Jours d'Hitler | 1973 | Screenplay |
| 4 de l'apocalypse | 1975 | Screenplay |
| I baroni | 1975 | Writer |
| Madame Kitty | 1976 | Screenplay |
| Le dernier amant romantique | 1978 | Writer |
| Schöner Gigolo, armer Gigolo | 1978 | Writer |
| Amo non amo | 1979 | Writer |
| Savage Breed | 1980 | Writer |
| Il buon soldato | 1982 | Screenplay |
| À couteau tiré | 1983 | Screenplay |
| La Double Vie de Mathias Pascal | 1985 | Screenplay |
| Le Diable au corps | 1986 | Writer |
| Don Bosco | 1988 | Screenplay |
| La maschera | 1988 | Writer |
| C'era un castello con 40 cani | 1990 | Screenplay |
| Il sole buio | 1990 | Screenplay |
| Mio caro dottor Gräsler | 1990 | Screenplay |
| Caldo soffocante | 1991 | Writer |
| Per odio, per amore | 1991 | Writer |
| Marcellino | 1991 | Writer |
| Fátima | 1997 | Writer |
