Firas Ahmed Mohammed, Fayyadh Mohammed Abed, Fayyadh Mohammed Abed, and Raaid Rashad Jassem, “THERMAL PERFORMANCE EVALUATION OF GROUND HEAT EXCHANGERS WITH NANO FLUIDS AND DIFFERENT PIPING SYSTEMS: EXPERIMENTAL STUDY IN IRAQ”, KSR, vol. 3, no. 2, pp. 27–40, Jul. 2026.