Some Cross-Linguistic Evidence for Modulation of Implicational Universals by Language-Specific Frequency Effects in Phonological Development 論文 Jan Edwards・Mary E. Beckman ·2008-04-08 ·『Language Learning and Development』 4(2) pp. 122-156 doi:10.1080/15475440801922115
On predicting phonological difficulty in second language acquisition 論文 Fred R. Eckman ·1981-01-01 ·『Studies in Second Language Acquisition』 4(1) pp. 18-30 doi:10.1017/s0272263100004253