BLACHERE, F.; BOROUCHAKI, H. Covariance edges matrix of geometric elements. Annals of Mathematics and Physics, [S. l.], v. 6, n. 2, p. 100–107, 2023. DOI: 10.17352/amp.000088. Disponível em: https://www.peertechzpublications.us/amp/article/view/AMP-6-188. Acesso em: 10 jan. 2025.