Hidayati, Rizka Dwi, 		Tirta, I Made, AND 		Dewi, Yuliani Setia.
" The Efficiency of First (GEE1) and Second (GEE2) Order “Generalized Estimating Equations” for Longitudinal Data" <em>Jurnal ILMU DASAR</em> [Online], Volume 15 Number 1 (7 August 2014)