S. Uğuz, “Special Warped-Like Product Manifolds with (Weak) $G_2$ Holonomy”, Ukr. Mat. Zhurn., vol. 65, no. 8, pp. 1126–1140, Aug. 2013, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2495