Hichem Omrani and  Philippe Gerber and  Patrick Bousch,  Model-Based Small Area Estimation with Application to Unemployment Estimates.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2009, vol. 25(1). 10 - 17
    [viewed 21 January 2020]. Available from: https://publications.waset.org/pdf/1569.