Frank, Christoph Bibliotheca Hertziana - Max-Planck-Institut für Kunstgeschichte, Max Planck Society;
Frank, C., Mathies, U., & Poulet, A. (2003). Etat des Choses: A Recently Discovered Document by Houdon. In A. L. Poulet (Ed.), Jean Antoine Houdon – Sculptor of the Enlightenment (pp. 28; 355-39; 360). Chicago: University of Chicago Press.
