Purs, G. A., and N. M. Mikhalkevich. “Development of Methodological and Organizational Approach to Determine the Cost of Construction through the Use of Variant Design”. Ways to Improve Construction Efficiency, no. 42 (September 27, 2019): 153–169. Accessed May 3, 2024. http://ways.knuba.edu.ua/article/view/195666.