1. Arnold, B.C., Balakrishnan, N., 1987. Relations, Bounds and Approximations for Order Statistics, Lecture Notes in Statistics. No 53. Springer, New York.
2. Arnold, B.C., Balakrishnan, N., Nagaraja, H.N., 1992. A First Course in Order Statistics. Wiley, New York.
3. David, H.A., 1981. Order Statistics. Wiley, New York.
4. The maxima of mean largest value and of the range;Gumbel;Ann. Math. Statist.,1954
5. Universal bounds for mean range and extreme observation;Hartley;Ann. Math. Statist.,1954