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2. Construction and validation of a questionnaire to study engagement in informal second language learning;Arndt;Studies in Second Language Acquisition,2023
3. Vocabulary learning from watching YouTube videos and reading blog posts;Arndt;Language, Learning and Technology,2018
4. Comparing autonomous and class-based learners in Brazil: Evidence for the present-day advantages of informal, out-of-class learning;Cole;System,2016
5. Learning English through out-of-school exposure. Which levels of language proficiency are attained and which types of input are important?;De Wilde;Bilingualism: Language and Cognition,2020