6Izumi. S. Output, input enhancement and the Noticing Hypothesis: An experimental study on ESL relativization[J].Studies in Second Language Acquisition, 2002 (24):541-77.
7Izumi. S.& M. Bigelow. Does output promote noticing and second language acquisition? [J]. TESOL Quarterly.2000(34):239-78.
8Kormos.J. Monitoring and self-repair in L2 [J]. Language Learning,1999(49):303-42.
9Kormos.J. The timing of self-repairs in second language speech production [J].Studies in Second Language Acquisition. 2000 (22) :145-67.
10Kowal. M.& M. Swain. Using collaborative language production tasks to promote students'language awareness[J]. Language Awareness, 1994 (3):73-93.