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D. V. Kapanadze, βOn the uniqueness of a solution of the problem with oblique derivative for the equation Ξ n v = 0β,
Ukr. Mat. Zhurn., vol. 58, no. 6, pp. 835β841, Jun. 2006, Accessed: Apr. 09, 2025. [Online]. Available:
https://umj.imath.kiev.ua/index.php/umj/article/view/3499