7Pica,T.Research on negotiation: what does it reveal about second language learning conditions, processes,and outcomes?[].Language Learning Journal.1994
8Long MH.The role of the linguistic environment in second language acquisition[].Handbook of Language Acquisition: Vol Second Language Acquistion.1996
9Laufer B,Hulstijn J.Incidental vocabulary acquisition in a second language: The construct of task-induced involvement[].Applied Linguistics.2001
10Wesche M,Paribakht T S.Assessing second language vocabulary knowledge: depth versus breadth[].The Canadian Modern Language Review.1996