1. Barakat, H. M., Nigm, E. M.: Weak limit of sample range and midrange for random sample sizes. Egyptian Statist. J., 34, 45–58 (1990)
2. Barakat, H. M., Nigm, E. M.: Convergence of random extremal quotient and product. J. Statist. Plann. Inference, 81, 209–221 (1999)
3. Barakat, H. M., Nigm, E. M.: Extreme order statistics under power normalization and random sample size. Kuwait J. Sci. Eng., 29, 27–41 (2002)
4. Barakat, H. M., El-Shandidy, M. A.: On general asymptotic behaviour of order statistics with random index. Bull. Malays. Math. Sci. Soc., 27, 169–183 (2004)
5. Berman, M. S.: Limit theorems for the maximum term in stationary sequences. Ann. Inst. Statist. Math., 35, 502–516 (1966)