WASET
    D.K. Rao and  M.G.M. Khan and  K.G. Reddy,  Optimum Stratiļ¬cation of a Skewed Population.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2014, vol. 87(3). 492 - 495
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/9997637.