Can Ambrosiana X 56 Sup. improve our understanding of Sībawayhi’s grammar?

Jean Druel, “Can Ambrosiana X 56 Sup. improve our understanding of Sībawayhi’s grammar?” in Manuela E. B. Giolfo and Kees Versteegh (editors), The Foundations of Arabic Linguistics IV,  Brill: Leiden, Boston, 2019, pages 133‒156.