Naz, S., M. J. Iqbal, S. M. Akhter, and I. Hussain. “The Gumbel Mixed Model for Flood Frequency Analysis of Tarbela”. The Nucleus, vol. 53, no. 3, Sept. 2016, pp. 171-9, http://thenucleuspak.org.pk/index.php/Nucleus/article/view/132.