“Osculating Spheres of a Semi Real Quaternionic Curve in E_2^4”, Eur. J. Pure Appl. Math., vol. 7, no. 1, pp. 86–96, Jan. 2014, Accessed: Dec. 22, 2024. [Online]. Available: https://www.ejpam.com/index.php/ejpam/article/view/1979