@misc{momi2-riikonen-2010,
  author = {Antti Riikonen},
  title = {Mobile Handset Population in Finland 2005-2009},
  year = {2010},
  type = {MoMI project report},
  url = {http://www.netlab.tkk.fi/tutkimus/momi/publications/Riikonen_2010_Mobile_Handset_Population_2005-2009.pdf},
}