GE, Chao; LI, Cun. Application of the Cosine Gray Model Based on System Cloud in the Forecast of Higher Education Scale. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 10, n. 8, p. pp. 16–20, 2015. DOI: 10.3991/ijet.v10i8.5207. Disponível em: https://online-journals.org/index.php/i-jet/article/view/5207. Acesso em: 28 apr. 2024.