@unpublished{NazaikinskiiSchulzeSternin2008,
  author  = {Vladimir Nazaikinskii and Bert-Wolfgang Schulze and Boris Sternin},
  title   = {Quantization methods in differential equations : Chapter 2: Exactly soluble commutation relations (The simplest class of classical mechanics)},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(2000) 14},
  year    = {2008},
}