@unpublished{MeloNestSchrohe2008,
  author  = {S. T. Melo and R. Nest and Elmar Schrohe},
  title   = {C*-structure and K-theory of Boutet de Monvel's algebra},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(2001) 33},
  year    = {2008},
}