@phdthesis{buettner2005gesichertes,
  author = {B{\"{u}}ttner, Michael},
  title = {{Gesichertes Voice-over-IP mit Vovida}},
  advisor = {Niedermayer, Heiko and Dressler, Falko},
  institution = {Wilhelm-Schickard-Institute for Computer Science},
  location = {T{\"{u}}bingen, Germany},
  month = {11},
  school = {University of T{\"{u}}bingen},
  type = {Bachelor Thesis},
  year = {2005},
}