1Burt, M.K. & Kiparsky, C. (1974) Global and local mistakes. In J. Schumann (ed.) , New Fron- tiers in Second Language Learning ( pp. 71 - 80). Row- ley, Mass. : Newbury House.
2Chun, A., Day, R., Chenoweth, A. & Luppescu, S. (1982) Errors, interaction, and correc- tion:A study of native-nonnative conversations. TESOL Quarterly, 16(4) : 537 -547.
3Corder, S.P. ( 1967 ) The significance of learners' errors. International Review of Applied Linguis- tics, 5(4) : 161 - 169.
5Dulay, H.C. & Burt, M.K. (1974) Natural sequences in child second language acquisition. Lan- guage Learning, 24( 1 ) : 37 -53.
6Lennon, P. ( 1991 ) Error: some problems of definition, identification, and distinction. Applied Lin- guistics, 12 (2) : 180 -196.
7Liski, E. & Puntanen, S. (1983) A study of the statistical foundations of group conversation tests in spoken English. Language Learning, 33 ( 2 ) : 225 - 246.
8Procter, P. ( 1978 ) Longman Dictionary of Contemporary English. Longman Group Limited.
9Procter, P. ( 1998 ) Cambridge International Dictionary of English. Cambridge University Press.
10Raupach, M. (1987) Procedural learning in advanced learners of a foreign language. In J. Coleman & R. Towell (eds.), The Advanced Language Learner (pp. 123 - 155). London: AFLS/CILT.