BRASCO, L. On principal frequencies and inradius in convex sets. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 9, n. 1, p. 78–101, 2018. DOI: 10.6092/issn.2240-2829/8945. Disponível em: https://mathematicalanalysis.unibo.it/article/view/8945. Acesso em: 5 may. 2024.