Plebankiewicz, Edyta, and Agnieszka Leśniak. “Overhead Costs and Profit Calculation by Polish Contractors”. Technological and Economic Development of Economy 19, no. 1 (April 2, 2013): 141-161. Accessed December 26, 2024. https://btp.vilniustech.lt/index.php/TEDE/article/view/4235.