@mastersThesis{JoaoPedrodeSousaCorreia_1_2021, author = "Jo{\~a}o Pedro de Sousa Correia", title = "Inference of Pronunciation Difficulty from Non-Native Data", school = "Instituto Superior T{\'e}cnico, Universidade de Lisboa", year = 2021, month = jan, type = "Master's Thesis", BibTexOrigem = "15005 www.Inesc-ID.pt 2023-03-28" }