@book{Maderdonner,
  author    = {Maderdonner, Otto},
  title     = {Nihongo e youkoso - Japanisch f{\"u}r Anf{\"a}nger},
  publisher      = {Fachhochschule Technikum Wien},
  subject      = {Language Learning},
  language  = {de}
}
@book{Maderdonner,
  author    = {Maderdonner, Otto},
  title     = {Nihongo e youkoso - L{\"o}sungsbuch mit CD},
  publisher      = {Fachhochschule Technikum Wien},
  subject      = {Language Learning},
  language  = {de}
}
@article{Maderdonner,
  author    = {Maderdonner, Otto},
  title     = {Problematic Aspects of Japanese Education},
  series = {Kyoiku Tsushin},
  journal   = {Kyoiku Tsushin},
  number    = {6},
  publisher = {Ministry of Education},
  address   = {Tokyo},
  subject      = {Education},
  language  = {en}
}