MUSIN, A.T. Canonisation reper of complex of lines of theree-dimensional flag. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 84, n. 4, p. 104–109, 2016. DOI: 10.31489/2016m4/104-109. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/132. Acesso em: 23 aug. 2025.