MuhammadS., ShamshuddeenS., and BaokuI. G. “ROBUST PARAMETER ESTIMATION FOR RANDOM EFFECT PANEL DATA MODEL IN THE PRESENCE OF HETEROSCEDASTICITY AND INFLUENTIAL OBSERVATIONS”. FUDMA JOURNAL OF SCIENCES, Vol. 5, no. 3, Nov. 2021, pp. 93 - 100, doi:10.33003/fjs-2021-0503-746.