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@article {186, 
  author = {S. Ponnusamy and A. Rasila and M. Vuorinen},
   title = {Special Classes of Planar Harmonic Univalent Mappings},
    year = {2009},
 journal = {Ramanujan Mathematical Society Mathematics Newsletter},
  volume = {19},
  number = {1},
   pages = {17--27}
}