QSOs sigposting cluster size halos as gravitational lenses: halo mass, projected mass density profile and concentration at z∼0.7. Issue 9 (12th September 2019) - Bonavera, L.; González-Nuevo, J.; Gómez, S.L. Suárez; Lapi, A.; Bianchini, F.; Negrello, M.; Alonso, E. Díez; Santos, J.D.; Juez, F.J. de Cos