Fikre , H. . “Application of Shallow Energy Piles for the Purpose of Heating and Cooling of Buildings”. Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት, vol. 40, July 2023, pp. 1-9, doi:10.20372/zede.v40i.6559.