Szukana fraza: [Abstract = "We consider a mathematical model which describes the flow of a Bingham fluid with friction. . We assume a stationary flow and we model the contact with damped response and a local version of Coulomb's law of friction. The problem leads to a quasi\-variational inequality for the velocity field. We establish the existence of a weak solution and, under additional assumptions, its uniqueness. The proofs are based on a new result obtained in \(Motreanu and Sofonea, 1999\). We also establish the continuous dependence of the solution with respect to the contact conditions."]