Invitation to higher local fields, Part II, section 5: Harmonic analysis   on algebraic groups over two-dimensional local fields of equal characteristic
  This work introduces author's approach to harmonic analysis on algebraic groups over functional two-dimensional local fields. For a two-dimensional local field a Hecke algebra which is formed by operators which integrate pro-locally-constant complex functions over a non-compact domain is defined and its properties are described. 
Mikhail Kapranov