Sullivan, Kirk P. H., and Frank Kügler. “Was the Knowledge of the Second Language or the Age Difference the Determining Factor?”.
International Journal of Speech, Language and the Law 8, no. 2 (August 5, 2001): 1–8. Accessed April 9, 2025.
https://journal.equinoxpub.com/IJSLL/article/view/6398.