Comments on ``Differential cross section for Aharonov-Bohm effect with   nonstandard boundary conditions''
  We show that the violation of rotational symmetry for differential cross section for Aharonov-Bohm effect with nonstandard boundary conditions has been known for some time. Moreover, the results were applied to discuss the Hall effect and persistent currents of fermions in a plane pierced by a flux tube. 
Alexander Moroz (FOM AMOLF, Amsterdam)