@book{krivoshlykov:1994:qfi,
    author = {Krivoshlykov, Sergej G.},
     title = {Quantum-Theoretical Formalism for Inhomogeneous Graded-Index
              Waveguides},
 publisher = {Akademie Verlag},
   address = {Berlin-New York},
      year = {1994},
     pages = {349},
      isbn = {3-05-501598-3},
   mrclass = {78A50 (78-02)},
  mrnumber = {MR1394200 (97d:78005)},
mrreviewer = {Apostolos Vourdas},
     zblno = {1103.78301}}