Sundqvist P, Peters E, Skar GB, Gyllstad H. Study Protocol: STarting AGe and Extramural English: Learning English in and Outside of School in Norway and Flanders (STAGE). Forum Linguist. Stud. [Internet]. 2025 Aug. 20 [cited 2025 Aug. 18];7(8):793–809. Available from: https://journals.bilpubgroup.com/index.php/fls/article/view/10412