@misc{SchmidtPucherGollner,
  author    = {Schmidt, Daniela and Pucher, Robert and Gollner, Helmut},
  title     = {How Online Teaching Material Can Help Students to Increase the Efficiency of Learning},
  subject      = {Teaching},
  language  = {en}
}
@misc{PucherSchmoellebeck,
  author    = {Pucher, Robert and Schm{\"o}llebeck, Fritz},
  title     = {Online Teaching in Traditional Face To Face Courses Help Students by Increasing the Flexibility of Their Study},
  subject      = {Teaching},
  language  = {en}
}