Zelenov, P. D. Y. N., Gubareva, P. D. A. V., & Kovalenko, P. D. K. E. (2017). Specificity of sinusoidal development of foreign economic activity in the Russian Federation. Universidad Y Sociedad, 9(5), 282–284. Recuperado a partir de https://rus.ucf.edu.cu/index.php/rus/article/view/743