O. V. Veselovskaya, “On the approximation and growth of entire harmonic functions in $R_n$”, Ukr. Mat. Zhurn., vol. 70, no. 4, pp. 464–470, Apr. 2018, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/1568