Looking for Giovanni Bocaccio's original short stories

The stories seem to be invented. I saw the following at http://www.chass.utoronto.ca/mcluhan-studies/v1_iss1/1_1art13.htm:
"
The dilemma is not insoluble; there is another path to follow. Pasolini took this route: he realized both the great potential film had to transmit cultural values and the risks involved in having someone else translate your vision, so from a poet and novelist he became a filmmaker. He wrote and directed his own films: the scripts he prepared from scratch or adapted from his own work (e.g. Teorema) or that of others, among them Boccaccio and Chaucer. To be sure, his Decameron (1971), which uses the Ciappelletto (1.1) and Giotto (6.5) stories to frame a selection of Boccaccio's tales, has as much to do with Boccaccio (but for radically different reasons) as Boccaccio '70. The latter is a 1962 film anthology directed by Fellini, Visconti, De Sica, and Monicelli. It includes four modern stories which Boccaccio might have written, on an off day. Nonetheless, the film was immensely successful abroad, in part because of the Boccaccio connection established by the title. The same may be said of Pasolini's Decameron, although by 1971 Pasolini had already established his reputation abroad as a prominent filmmaker, if not a writer. His relatively small but dedicated Anglo-American public was already familiar with Accattone (1960), his first feature film, The Gospel According to St. Matthew (1964), and Teorema (1968). His Una vita violenta (1959) was only translated in 1968 on the heels of his success as a filmmaker. Subsequently, several of his other literary works, including Ragazzi di vita (1955), were translated. The present intense interest in Pasolini in the Anglo-American world is due to a number of factors: his sexual orientation (the rise of gay studies); his Marxist political stance; his tragic death (which contributed to defining his public persona as an outspoken outcast); his production as a filmmaker. All of these factors, but especially the last, have led to a rediscovery, or better discovery, abroad of Pasolini the writer (Rumble and Testa, Gatt-Rutter)."

The stories are not in Boccaccio. The entire 4-segments-film was the idea of a producer and directors and made to fight against censorship. They were fed up with all the restrictions imposed on films in general by governmental censoring, by the church and the right-wing press. The film was meant to fight for the right of free expression and the same liberty for films that was allowed to literature.

That's more or less what I happened to read in Tullio Kezich's Fellini biography actually today. I guess the title reference to Boccaccio can be seen as a statement: look what Boccaccio would write if he was alive today. Boccaccio was regarded as a very liberal writer and therefore not a 'suitable' reading for everybody, but he was also regarded as a hallmark of Italian literature whose status as a classic was beyond challenge.

Regards, Rosabel