V. N. Lozhkin, “Conditions of existence of univalently stressed contours in the first main problem of the theory of elasticity for a plane with cut”, Ukr. Mat. Zhurn., vol. 47, no. 2, pp. 295–296, Feb. 1995, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5416