Equations of motion in scalar-tensor theories of gravity: A covariant   multipolar approach
  We discuss the dynamics of extended test bodies for a large class of scalar-tensor theories of gravitation. A covariant multipolar Mathisson-Papapetrou-Dixon type of approach is used to derive the equations of motion in a systematic way for both Jordan and Einstein formulations of these theories. The results obtained provide the framework to experimentally test scalar-tensor theories by means of extended test bodies. 
Yuri N. Obukhov, Dirk Puetzfeld
gr-qc astro-ph.CO hep-th