Kongbang, J., and N. . Pongpairoj. “The Acquisition of English Regular and Irregular Plural Morphemes by L1 Thai Learners: A Case of the Failed Functional Features Hypothesis”. Language and Linguistics, vol. 40, no. 2, Sept. 2022, pp. 147-73, https://so04.tci-thaijo.org/index.php/joling/article/view/253891.