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@article {318, 
  author = {Marko Huhtanen and Santtu Ruotsalainen},
   title = {Factoring in the metaplectic group and optics},
    year = {2011},
 journal = {Operators and matrices},
  volume = {5},
  number = {1},
   pages = {173-181},
    issn = {1846-3886}
}