Reconstructing the projected gravitational potential of galaxy clusters from galaxy kinematics Eleonora Sarli, Sven Meyer, Massimo Meneghetti, Sara Konrad, Charles L. Majer and Matthias Bartelmann A&A, 570 (2014) A9 Published online: 07 October 2014 DOI: 10.1051/0004-6361/201321748