Gaetano La Russa Erkki Sutinen Johannes C. Cronjé Avatar Aided e-Learning Fundraising System. 246-249 2008 ICALT https://doi.org/10.1109/ICALT.2008.140 https://doi.ieeecomputersociety.org/10.1109/ICALT.2008.140 conf/icalt/2008 db/conf/icalt/icalt2008.html#RussaSC08