1. Y.-M. Chu, S.-W. Hou, Z.-H. Shen, Sharp bounds for Seiffert mean in terms of root mean square. J. Inequal. Appl. 11, 6 (2012). doi: 10.1186/1029-242X-2012-11
2. Y.-M. Chu, M.-K. Wang, W.-M. Gong, Two sharp double inequalities for Seiffert mean. J. Inequal. Appl. 44, 7 (2011). doi: 10.1186/1029-242X-2011-44
3. Y. Hua, F. Qi, The best bounds for Toader mean in terms of the centroidal and arithmetic means. Filomat 28 4, 775–780 (2014). doi: 10.2298/FIL1404775H
4. W.-D. Jiang and F. Qi, Sharp bounds for Neuman-Sándor’s mean in terms of the root-mean-square, available online at http://arxiv.org/abs/1301.3267
5. W.-D. Jiang, F. Qi, Some sharp inequalities involving Seiffert and other means and their concise proofs. Math. Inequal. Appl. 15(4), 1007–1017 (2012). doi: 10.7153/mia-15-86