Artal Bartolo, Enrique, Vincent Florens, and Benoît Guerville-Ballé. “A Topological Invariant of Line Arrangements”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 17, no. 3 (September 21, 2017): 949-968. Accessed May 26, 2026. https://journals-dev.sns.it/index.php/annaliscienze/article/view/518.