Norcor vs the Abominable Gauge Completion
  We use normal coordinate methods to obtain the expansion with respect to fermionic coordinates of the 11-dimensional supermembrane action in a supergravity background. Likewise, expansions for various branes in other dimensions can be obtained. These methods allow a systematic and unambiguous expansion of the vielbein to any order in the fermionic coordinates and avoid the complications encountered in the gauge completion approach. 
Marcus T. Grisaru and Marcia E. Knutt