EZHOVA-GUSEVA, L.; KLIMANOVA, T.; YASINSKAYA, E. Metric invariants of equations of Hermitean quadrics in unitary non-Euclidean and semi- non-Euclidean spaces. Lithuanian Mathematical Journal, [S. l.], v. 6, n. 4, p. 503–513, 1966. DOI: 10.15388/LMJ.1966.19749. Disponível em: https://www.journals.vu.lt/LMJ/article/view/19749. Acesso em: 14 apr. 2025.