Environmental factors of ensuring the competitiveness of construction enterprises Viktoriya Mokhonko, Natalia Blinova, Lesia Sheludko, Sergiy Kobzan, Anna Tsyhenko and Olena Uhodnikova E3S Web Conf., 244 (2021) 10049 Published online: 19 March 2021 DOI: 10.1051/e3sconf/202124410049