Litvinenko, I.L., Ju.S. Pinkovetskaya, V.E. Korolkov, V.F. Protas, N.N. Solovyh, and G.A. Terskaya. 2018. “Differentiation of Small and Medium Enterprises Based on Headcount”. Revista Publicando 5 (16 (2): 290-303. https://revistapublicando.org/revista/index.php/crv/article/view/1666.