Osculating Spheres of a Semi Real Quaternionic Curve in E_2^4. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 7, n. 1, p. 86–96, 2014. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/1979. Acesso em: 22 dec. 2024.