Castel-Branco, Nuno External, Max Planck Institute for the History of Science, Max Planck Society;
Castel-Branco, N. (2014). Perturbation of the metric around a spherical body from a nonminimal coupling between matter and curvature. Physics Letters B, 735, 25-32. doi:10.1016/j.physletb.2014.06.001.