fileadmin/content/institute/iim/dokumente/forschung/danish-german-working-paper-series/2-danish-german-research-paper-no.-2.pdf
course design, No. 9, audio cassettes. In The role of technology in distance eduation Kent: Croom Helm. Ebner, M. & Walder, U. (2007). E-learning in civil engineering – six years of experience at graz