Noncommutative gravity in three dimensions coupled to spinning sources
  Noncommutative gravity in three dimensions with vanishing cosmological constant is examined. We find a solution which describes a spacetime in the presence of a torsional source. We estimate the phase shift for each partial wave of a scalar field in the spacetime by the Born approximation. 
Kiyoshi Shiraishi, Kenji Sakamoto and Nahomi Kan (Yamaguchi Univ.)