Haibin H, Chunrong L. Optimal Bounds for Neuman-S´andor Mean in Terms of the Convex Combination of Geometric and Contra-harmonic Means. m [Internet]. 2016Nov.30 [cited 2024Dec.4];2(11):27-. Available from: http://13.234.104.160/index.php/m/article/view/1623