Tashbih, Takia, and Mohammad Ariful Islam. “Effect of Grout Thermal Conductivity and Leg-Spacing on the Borehole Length of U-Tube Ground Heat Exchanger”. SciEn Conference Series: Engineering 3 (November 11, 2025): 677–682. Accessed March 11, 2026. https://scienpg.com/scs/index.php/engineering/article/view/scse.2025.3.169.