In the segment "Antoine et Colette": on the wall of Antoine's second flat there is a poster for The 400 Blows (1959), which also starred Jean-Pierre Léaud as Antoine Doinel.
Hervé Bazin (real name: Jean-Pierre Hervé-Bazin) (1911 - 1996) was a French writer, whose best-known novels covered teenage rebellion and dysfunctional families. His first novel was 'Vipere au poing' ('Viper in the fist') in 1948 (this is named as 'A Snake in his Fist' in the sub-titles).
Pierre Schaeffer (1910 - 1995) was a French composer, writer and broadcaster most widely recognized as the chief pioneer of musique concrète, a form of experimental music.
Bernard Gavoty (1908 - 1981) was a French organist and music critic.