@book{Schulmeister2002,
  author    = {Schulmeister, Rolf},
  title     = {{Grundlagen hypermedialer Lernsysteme. Theorie --
              Didaktik -- Design}},
  year      = 2002,
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen, Wien},
  edition   = {3.~{A}ufl.},
  isbn 		= {3-486-25864-8},
}