ABEYSINGHE, A.M.P.B.; JAYATILLEKE, B.G.; ATHAPATTU, Bandunee C L; GAMINI, L.P.S. Historical perspectives on costing of ODL courses: re-evaluate the implement at the Open University of Sri Lanka. Advances in Social Sciences Research Journal, [S. l.], v. 3, n. 13, 2016. DOI: 10.14738/assrj.313.2548. Disponível em: https://scholarpublishing.org/journals/index.php/ASSRJ/article/view/2491. Acesso em: 28 may. 2026.