4Lambert,R.& S.Moore.Problem areas in the study of language attrition[A].B.Weltens et al.Language Attrition in Progress[C].Dordrecht,Holland:Foris,1984.177-186.
5Seliger,H,& R.Vago.First Language Attrition[C].Cambridge:Cambridge University Press,1991.
6Tomiyama,M.The first stage of second language attrition:a case study of a Japanese returnee[A].L.Hansen.Second Language Attrition in Japanese Context[C].Oxford:Oxford University Press,1999:59 -79.
7Weltens,B,T.Van Els,& E.Schils.The long-term retention of French by Dutch students[J].Studies in Second Language Acquisition,1989,(2):205 -216.
8Yoshitomi,A.Towards a model of language attrition:Neurobiological and psychological contributions[J].Issues in Applied Linguistics,1992,(2):293 -318.
9Kuhberg,H.Longitudinal L2-attrition versus L2-acquisition in three Turkish children:Empirical findings[J].Second Language Research,1992,(2):138-154.
10Gurel,A.Selectivity in L2 induced L1 attrition:A psycholinguistic account[J].Journal of Neurolinguistics,2004,(17):53 -78.