S. Terracini, G. Tortone, S. Vita: On s-harmonic functions on cones Analysis & PDE 2018 G. Tortone, A. Zilio: Regularity results for segregated configurations involving fractional Laplacian Nonlinear Analysis 2019 Y. Sire, S. Terracini, G. Tortone: On the nodal set of solutions to degenerate or singular elliptic equations with an application to $s-$harmonic functions Journal de Mathématiques Pures et Appliquées 2020 G. Tortone: The nodal set of solutions to some nonlocal sublinear problems Calculus of Variations and Partial Differential Equations 2020 D. De Silva, G. Tortone: Improvement of flatness for vector valued free boundary problems Mathematics in Engineering 2020 G. Tortone: Regularity of shape optimizers for some spectral fractional problems Journal of Functional Analysis 2021 L. Ferreri, G. Tortone, B. Velichkov: A capillarity one-phase Bernoulli free boundary problem (preprint) 2023 D. De Silva, G. Tortone: A vectorial problem with thin free boundary Calculus of Variations and Partial Differential Equations 2023 F. P. Maiale, G. Tortone, B. Velichkov: Epsilon-regularity for the solutions of a free boundary system Revista Matemática Iberoamericana 2023 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 S. Terracini, G. Tortone, S. Vita: A priori regularity estimates for equations degenerating on nodal sets (preprint) 2024 D. Mazzoleni, G. Tortone, B. Velichkov: On the dimension of the singular set in optimization problems with measure constraint J. Convex Analysis: volume dedicated to Giuseppe Buttazzo on the occasion of his 70th birthday. 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 N. Soave, G. Tortone: On the nodal set of solutions to some sublinear equations without homogeneity Arch. Rat. Mech. Anal. 2024 S. Terracini, G. Tortone, S. Vita: Higher order boundary Harnack principle via degenerate equations Arch. Rat. Mech. Anal. 2024 G. Tortone: Liouville theorems and optimal regularity in elliptic equations Proceedings of the London Mathematical Society 2024 A. Pacati, G. Tortone, B. Velichkov: Some remarks on singular capillary cones with free boundary (preprint) 2025