Chaikovska, Inna, and Maksym Chaikovskyi. “Development of an economic­mathematical Model to Determine the Optimal Duration of Project Operations”. Eastern-European Journal of Enterprise Technologies 3, no. 3 (105) (June 30, 2020): 34–42. Accessed November 24, 2024. https://journals.uran.ua/eejet/article/view/205114.