Gauge (in)dependence and UV/IR mixing
  The gauge independence in connection with the UV/IR-mixing is discussed with the help of the non-commutative U(1)-gauge field model proposed by A. A. Slavnov with two different gauges: the covariant gauge fixing defined via a gauge parameter \alpha and the non-standard axial-gauge depending on a fixed gauge direction n^\mu. 
M. Attems, D.N. Blaschke, S. Hohenegger, M. Schweda, S. Stricker