Index Theory for Real Factors
  The notion of index for arbitrary real factors is introduced and investigated. The main tool in our approach is the reduction of real factors to involutive *-anti-automorphisms of their complex enveloping von Neumann algebras. Similar to the complex case the values of the index for real factors are calculated. 
S. Albeverio, Sh.A. Ayupov, A.A. Rakhimov, R.A. Dadakhodjaev
math.OA