G. Buttazzo, F. P. Maiale: Optimal one-dimensional structures for the principal eigenvalue of two-dimensional domains (Accepted Paper) 2020 G. Buttazzo, F. P. Maiale: Shape optimization problems for functionals with a boundary integral (Accepted Paper) 2020 K. O. Idu, V. Magnani, F. P. Maiale: Characterizations of $k$-rectifiability in homogenous groups J. Math. Anal. Appl. Vol. 500, N. 2, p. 20, 2021 G. Buttazzo, F. P. Maiale, B. Velichkov: Shape optimization problems in control form Rend. Lincei Mat. Appl. 2021 F. P. Maiale: Shape Optimization Problems and Regularity of the Free Boundaries (Ph.D. Thesis) p. 200, 2022 K. O. Idu, F. P. Maiale: $C^{1,}$-rectifiability in low codimension in Heisenberg groups (preprint) http://arxiv.org/abs/2102.05165v3 2023 F. P. Maiale, G. Tortone, B. Velichkov: Epsilon-regularity for the solutions of a free boundary system Revista Matemática Iberoamericana 2023 N. Guglielmi, F. P. Maiale: Gripenberg-like algorithm for the lower spectral radius (Submitted Paper) http://arxiv.org/abs/2409.16822 2024 F. P. Maiale, G. Tortone, B. Velichkov: The boundary Harnack principle on optimal domains Annali della Scuola Normale Superiore di Pisa, Classe di Scienze 2024 G. Buttazzo, F. P. Maiale, D. Mazzoleni, G. Tortone, B. Velichkov: Regularity of the optimal sets for a class of integral shape functionals Arch. Rat. Mech. Anal. 2024