ENFOQUE

• A Primer of Algebraic D-modules
  COUTINHO S.C.
  L.M.S. Student Texts 33
  1995.
• La géographie de l’évolution
  SIMPSON G.G.
  Masson, Paris
  1969
• A Practical Guide to Splines, New York
  DE BOOR C.
  Springer Verlag
  1978.
• International Meteorological Vocabulary
  WORLD METEOROLOGICAL ORGANIZATION
  1966.