Perceived phonetic dissimilarity and L2 speech learning: the case of Japanese /r/ and English /l/ and /r/ 論文 Katsura Aoyama・James Emil Flege・Susan G. Guion・Reiko Akahane-Yamada・Tsuneo Yamada ·2003-12-04 ·『Journal of Phonetics』 32(2) pp. 233-250 doi:10.1016/s0095-4470(03)00036-6