“Coefficients Characterization of Entire Harmonic Functions in Terms of Norm of Gradients at Origin in R^n, n≥ 3”. European Journal of Pure and Applied Mathematics 13, no. 2 (April 29, 2020): 258–268. Accessed May 2, 2024. https://ejpam.com/index.php/ejpam/article/view/3636.