G. Di Fazio, Maria Stella Fanciullo, P. Zamboni:
Harnack inequality and regularity for degenerate quasilinear elliptic
  equations
(preprint) 2010

G. Di Fazio, Maria Stella Fanciullo, P. Zamboni:
Hölder regularity for non divergence form elliptic equations with
  discontinuous coefficients
(preprint) 2012

G. Di Fazio, E. Francini, F. Raciti, S. Vessella:
Stable determination of a Lamé coefficient by one internal measurement
  of displacement
(preprint) 2017

G. Di Fazio, T. Nguyen:
Regularity estimates in weighted Morrey spaces for quasilinear elliptic
  equations
(preprint) 2018