Nazarko, Joanicjusz, and Ewa Chodakowska. “Labour Efficiency in Construction Industry in Europe Based on Frontier Methods: Data Envelopment Analysis and Stochastic Frontier Analysis”. Journal of Civil Engineering and Management 23, no. 6 (June 22, 2017): 787-795. Accessed December 22, 2024. https://journals.vilniustech.lt/index.php/JCEM/article/view/1180.