Nikolayev М. А.; Makhotaeva Yu.М. Factors of Economic Growth in the Regions of the North-West Federal District of Russia. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 3, p. 42–45, 2015. DOI: 10.17770/etr2013vol3.878. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/878.. Acesso em: 1 may. 2024.