  An existence result for a class of mean field games of controls is provided.
In the considered model, the cost functional to be minimized by each agent
involves a price depending at a given time on the controls of all agents and a
congestion term. The existence of a classical solution is demonstrated with the
Leray-Schauder theorem; the proof relies in particular on a priori bounds for
the solution, which are obtained with the help of a potential formulation of
the problem.
