@PhdThesis{Opportunistic_Bartering_of_Digital_Goods_and_Services_in_Pervasive_Environments,
  author = "Olga Vladi Ratsimor",
  title = "{Opportunistic Bartering of Digital Goods and Services in Pervasive Environments}",
  month = "August",
  year = "2007",
  organization = "Department of COmuter Science and Electrical Engineering",
  series = "Ph.D. Dissertation",
  school = "University of Maryland, Baltimore County",
}