@book{OPUS4-2521,
  title     = {Requirements engineering: foundation for software quality},
  editor    = {Kamsties, Erik and Horkoff, Jennifer and Dalpiaz, Fabiano},
  publisher = {Springer International Publishing},
  address   = {Cham},
  isbn      = {978-3-319-77242-4},
  pages     = {XVII, 369},
  year      = {2018},
  language  = {en}
}
@book{OPUS4-1618,
  title     = {International research conference 2016},
  editor    = {Reusch, Peter and Wolff, Carsten},
  publisher = {Fachhochschule Dortmund},
  address   = {Dortmund},
  isbn      = {978-3-00-055144-4},
  pages     = {228},
  year      = {2016},
  language  = {en}
}
@book{TaegerKuhnt2014,
  author    = {Taeger, Dirk and Kuhnt, Sonja},
  title     = {Statistical hypothesis testing with SAS and R},
  publisher = {Wiley},
  address   = {Chichester},
  isbn      = {978-1-119-95021-9},
  pages     = {XIV, 292},
  year      = {2014},
  language  = {en}
}