U. Dursun and N. C. Turgay, “Space-like surfaces in Minkowski space $E^4_1$ with pointwise 1-type Gauss map”, Ukr. Mat. Zhurn., vol. 71, no. 1, pp. 59–72, Jan. 2019, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/1419