In 1986, she published her book Aristoxène de Tarente et Aristote ; le Traité d'Harmonique for which she received the médaille Georges Perrot from the Académie des Inscriptions et Belles-Lettres.
Annie Bélis learned to play the piano with Yvonne Lefébure, the organ and counterpoint with Arsène Bedois, the flute with Serge Kalisky, and the cello with Jeoffrey Walz.
In 2004, she published her work[7] on a papyrus discovered in an unusual way by Laurent Capron, at the time a study engineer at the Institute of Papyrology of the Sorbonne, at the Louvre Museum.
In 2016, still under the direction of Annie Bélis, the Ensemble Kérylos produced a new recording, D'Euripide aux premiers chrétiens, a new interpretation of the scores of the previous CD taking into account progress in academic research in the field.
This CD has the first recording of the "Roman Kithara" reconstructed by Annie Bélis and Carlos Gonzalez and the "Paean to Apollo" written by Mesomedes of Crete in its corrected edition.