4Leech, G. 1998. Preface [A]. In S. Granger (ed.).Learner English on Computer [ C]. New York:Longman.
5Mitton, R. 1996. English Spelling and the Computer [M]. London: Longman.
6Tesdell, L.S. 1987. Patterns in the spelling errors of non-native speakers of English [ J ]. Guidelines: A Periodical for Classroom Language Teachers (Singapore) 9/1: 80-84.
7West, M. 1953. A General Service List of English Words [M]. London: Longman.
8Xue Guoyi & P. Nation. 1990. A university word list [A]. In P. Nation (ed.). Teaching and Learning Vocabulary [ C ]. Boston: Heinle and Heinle Publishers.
9Dagneaux E., S. Denness & S. Granger. 1998. Computer-aided Error Analysis [J]. System 26: 163-174.
10Garside, R. & P. Rayson. 1996. Higher level annotation tools [A]. In R. Garside, G. Leech & A.McEnery ( eds. ). Corpus Annotation [C]. London: Longman.
