C. Antonucci, M. Gobbino, M. Migliorini, N. Picenni:
On the shape factor of interaction laws for a non-local approximation of  the Sobolev norm and the total variation
C. R. Math. Acad. Sci. Paris 2018

C. Antonucci, M. Gobbino, M. Migliorini, N. Picenni:
Optimal constants for a non-local approximation of Sobolev norms and  total variation
Anal. PDE 2020

C. Antonucci, M. Gobbino, N. Picenni:
On the gap between Gamma-limit and pointwise limit for a non-local  approximation of the total variation
Anal. PDE 2020