1. Automated essay scoring with e-rater V.2.0;Attali,2004
2. The CELEX lexical database [CD-ROM];Baayen,1995
3. Fundamental considerations in language testing;Bachman,1990
4. Documenting features of written language production typical at different IELTS band score levels;Banerjee,2007
5. Should we use characteristics of conversation to measure grammatical complexity in L2 writing development?;Biber;TESOL Quarterly,2011