"Shadows of rotating black holes in alternative theories" (2018) Amarilla, L.;Eiroa, E.F.;Ruffini R. (...)Jantzen R.T. 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories:3543-3548

"WAdS3/CFT2 correspondence in presence of bulk massive gravitons" (2018) Donnay, L.;Giribet, G.;Ruffini R. (...)Jantzen R.T. 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories:4216-4221