WASET
    Paul Christodoulides and  Georgios Florides and  Panayiotis Pouloupatis and  Vassilios Messaritis and  Lazaros Lazari,  Ground Heat Exchanger Modeling Developed for Energy Flows of an Incompressible Fluid.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2012, vol. 63(3). 640 - 644
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/13387.