@mastersthesis{plieninger2015,
  author = {Andreas Plieninger},
  title = {{Concept of a Placement Test on Mobile Phones for Learning German as a Foreign Language}},
  year = {2015},
  month = {Mar},
  school = {Lehrstuhl f\"{u}r Medientechnik, Technische Universit\"{a}t M\"{u}nchen},
}