Samuel David Epstein, Suzanne Flynn and Gita Martohardjono (1996). Second language acquisition: Theoretical and experimental issues in contemporary research. BBS 19:677–758.
Universal Grammar and the critical age
Differences of opinion between Epstein, Flynn &
Martohardjono (1996) and some commentators can be traced
to different interpretations of Universal Grammar (UG) form
or strategy. Potential full access to the form of linguistic
universals in second language acquisition may be distinguished from
access to UG strategy, but Epstein et al.'s dismissal of the
Critical Age Hypothesis clouds their central argument.