1. Seiffert H-J: Aufgabe β 16. Die Wurzel 1995, 29: 221–222.
2. Chu Y-M, Wang M-K, Qiu Y-F: An optimal double inequality between power-type Heron and Seiffert mean. J Inequal Appl 2010, 11. Article ID 146945
3. Wang M-K, Qiu Y-F, Chu Y-M: Sharp bounds for Seiffert means in terms of Lehmer means. J Math Inequal 2010,4(4):581–586.
4. Shi H-N, Zhang J, Li D-M: Schur-geometric convexity for differences of means. Appl Math E-Notes 2010, 10: 275–284.
5. Taneja IJ: Refinement of inequalities among means. J Comb Inf Syst Sci 2006,31(1–4):343–364.