Higazi, S. F., Abdel-Hady, D. H. and Al-Oulfi, S. A. M. (2012) “Factors Affecting Malnutrition in Developing Countries: A Linear Mixed Model Approach”, Pakistan Journal of Statistics and Operation Research, 8(4), pp. 821-837. doi: 10.18187/pjsor.v8i4.254.