Konert-Panek, Monika. “Singing Accent Americanisation in the Light of Frequency Effects: LOT Unrounding and PRICE Monophthongisation in Focus”. Research in Language 16, no. 2 (June 30, 2018): 155–168. Accessed April 19, 2024. https://czasopisma.uni.lodz.pl/research/article/view/8061.