@book{ScVo04,
  title = {{Location Based Services}},
  editor = {Agn{\`e}s Voisard and Jochen Schiller},
  publisher = {Morgan Kaufmann},
  year = {2004},
  address = {San Fransisco},
  month = {April},
  __markedentry = {[Tomek]},
  url = {http://www.elsevier.com/wps/find/bookdescription.cws_home/702603/description#description},
}