PRYKARPATSKI, A.K.; ARTEMOVYCH, O.D.; POPOWICZ, Z.; PAVLOV, M.V. Riemann type algebraic structures and their differential-algebraic integrability analysis. Carpathian Mathematical Publications, [S. l.], v. 2, n. 1, p. 96–108, 2010. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/3996. Acesso em: 12 jul. 2024.