Paper  bibtex   

@misc{Breier_DdI_2_2003,
  author    = {Norbert Breier},
  title     = {{Didaktik der Informatik -- Folienskript --
              2.~Vorlesung im Wintersemester 2001}},
  date      = {2003-04-07},
  url={https://is.gd/wFdLtJ},
  annote = {http://web.archive.org/web/20030224115154/http://www.uni-greifswald.de/fakul/mathematics/edv/ddi/Teil2.pdf},
  urldate={2016-05-31},
}