Saleh, A.A.M. (2014) “Energy Saving of Heat Gain by Using Buried Pipe Inside a Roof”, Al-Khwarizmi Engineering Journal, 11(1), pp. 32–39. Available at: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/212 (Accessed: 7 January 2026).