A Note on a Paper of S.G. Kim: doi:10.17398/2605-5686.33.2.145. Extr. Math. [Internet]. 2018 Dec. 1 [cited 2024 Dec. 22];33(2):145-7. Available from: https://revista-em.unex.es/index.php/EM/article/view/2605-5686.33.2.145