K. Amouri, F., and M. R. Almallah. “Stress Distribution In Two Layers Of H.V.D.C Cable Insulation For Cooling Outer Conductor”. Al-Rafidain Engineering Journal (AREJ), vol. 22, no. 2, Apr. 2014, pp. 38-49, doi:10.33899/rengj.2014.87320.