Schwartz, G., & Wojtkowiak, E. (2024). Asymmetrical Equivalence Classification – Cluster Affrication vs. Lenis Stops in the Speech of Polish Learners of English. Research in Language, 21(4), 421–442. https://doi.org/10.18778/1731-7533.21.4.05 (Original work published December 28, 2023)