Wiki for Vocabulary Acquisition

This class has really opened my eyes to the Wiki world - how to use it, why to use it, who to use it with, etc. For Second Language Vocabulary Acquisition (ENGL 670), there are two topic review papers - one already completed. However, for the second paper, due next week, I wish to investigate the use of wikis for helping in SLA vocabulary acquisition. This is no easy task...
These papers should focus on journal articles, which I have found wikis in a couple journals. However, the difficulty lies in the vocabulary aspect... only half of what I initially found for wikis in journals relate to vocabulary. So, I am finding it harder to find journal articles (for free) that I can use for this paper.
I should state that I have requested via interlibrary loan some books on wikis (including Wikinomics and Brave New Digital Classroom: Technololgy and Foreign Language Learning) but the primary sources should be journal articles.
So, I hope to find just a few more articles (with the help of Penn State library...) by tomorrow to put together a paper for next week.