Iyigün, E. “On Darboux Vector in Lorentzian 5-Space”. Ukrains’kyi Matematychnyi Zhurnal 70, no. 5 (May 25, 2018): 635-641. Accessed April 26, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1583.