ELKJÆR, Morten. Detect, diagnose and intervene: Students’ mathematics-specific difficulties with linear equations in an online learning environment. Aarhus, DK: Aarhus Universitet,2024. DOI: 10.7146/aul.530. Disponível em: https://openbooks.kb.dk/au/catalog/book/530. Acesso em: 2 oct. 2025.