(1988) : Recapitulation, regression, and language loss. Forthcoming in : H. Seliger , R. Vago (eds.), First language attrition : Theoretical and structural perspectives. Cambridge : C.U.P.
(1983) : On first language loss in the second language acquirer: Problems of transfer. In : S. Gass & L. Selinker (eds.), Language transfer in language learningRowley (Mass.) : Newbury House, 222–231.