  In this article we study stability aspects for the determination of
time-dependent vector and scalar potentials in relativistic Schr\"odinger
equation from partial knowledge of boundary measurements. For space dimensions
strictly greater than 2 we obtain log-log stability estimates for the
determination of vector potentials (modulo gauge equivalence) and log-log-log
stability estimates for the determination of scalar potentials from partial
boundary data assuming suitable a-priori bounds on these potentials.
