@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}, }