1. ACTFL 2001 ACTFL Proficiency Guidelines-Writing http://www.actfl.org/files/public/writingguidelines.pdf
2. Developmental sequences
3. The Primacy of Aspect in First and Second Language Acquisition
4. Aronsson , L. 2002 Operation of a large scale, general purpose wiki website. Experience from susning.nu's first nine months in service Proceedings of the 6th International ICCCC/IFIP Conference on Electronic Publishing, Czech Republic 27 37 http://aronsson.se/wikipaper.html