3D Higher-Spin Gauge Theories with Matter
  This paper is a letter-type version of hep-th/9806236. We discuss properties of non-linear equations of motion which describe higher-spin gauge interactions for massive spin-0 and spin-1/2 matter fields in 2+1 dimensional anti-de Sitter space. The model is shown to have N=2 supersymmetry and to describe higher-spin interactions of d3 N=2 massive hypermultiplets. An integrating flow is found which reduces the full non-linear system to the free field equations via a non-local B\"acklund-Nicolai-type mapping. 
Sergey Prokushkin and Mikhail Vasiliev (Lebedev Physics Institute)