Makovii, V. ., S. . Voloshyna, Y. . Kushnir, I. . Mykhailova, and S. . Tsarenko. “Contracts for the Provision of Services and Labor: A Comparative Analysis Under the Ukrainian Legislation”. European Journal of Sustainable Development, vol. 10, no. 1, Feb. 2021, p. 466, doi:10.14207/ejsd.2021.v10n1p466.