ADDITIONAL REFERENCES
- R. Cisbani, “Contributi alia teoria delle medie I,” Metron, 13 (2) (1938), 23–34.
- E. B. Leach and M. C. Sholander, “Extended mean values,” Amer. Math. Monthly, 81 (1974), 879–883.
- E. B. Leach and M. C. Sholander, “Extended mean values II,” J. Math. Anal. Appl. 92 (1983), 207–223.
- E. B. Leach and M. C. Sholander, “Multivariable extended mean values,” J. Math. Anal. Appl. 104 (1984), 390–407.