Russell S. Johnson Elizabeth A. Kemp Ray H. Kemp Peter Blakey The Virtual Learning Machine: Integrating Web and Non-Web Technologies. 328-329 2003 conf/icalt/2003 ICALT http://doi.ieeecomputersociety.org/10.1109/ICALT.2003.1215107 db/conf/icalt/icalt2003.html#JohnsonKKB03