1Bahrick,Harry P.1984a.Fifty years of second language attrition:Implications for programmatic research.MLJ 68(2):105-118.
2Hansen,Lynne 2001.Language attrition in contexts of Japanese bilingualism[A].In Mary Noguchi & Sandra Fotos (eds.).Studies in Japanese bilingualism[C].London:Multilingual Matters.
3Kennedy,L.1932.The retention of certain Latin syntactical principles by first and second year Latin students after various time intervals[J].Journal of Educational.
4Tomiyama,Machiko 1999.The first stage of second language attrition:A case study of a Japanese returnee[A].In Lynne Hansen (ed.),Second language attrition:Evidence from Japanese contexts[C].59-79.
5Weltens,Bert 1987.The attrition of foreignlanguage skills:A literature review.Applied Linguistics 8:22-37.