Existence of Klyachko Models for GL(n;R) and GL(n;C)
  We prove that any unitary representation of GL(n;R) and GL(n;C) admits an equivariant linear form with respect to one of the subgroups considered by Klyachko. 
Dmitry Gourevitch, Omer OFfen, Siddhartha Sahi and Eitan Sayag
math.RT