@inproceedings{stefanov:hal-00190102, TITLE = {{Analysis of the usage of the Virtuoso system}}, AUTHOR = {Stefanov, Krassen and Stefanova, Eliza}, URL = {https://telearn.hal.science/hal-00190102}, BOOKTITLE = {{AIED Workshop on Usage Analysis in Learning Systems}}, ADDRESS = {Amsterdam, Netherlands}, PAGES = {8 pages}, YEAR = {2005}, KEYWORDS = {tracking ; computer assisted language learning (CALL)}, PDF = {https://telearn.hal.science/hal-00190102/file/Stefanov-2005.pdf}, HAL_ID = {hal-00190102}, HAL_VERSION = {v1}, }