System assessment of ecological and economic activity of PJSC “LUKOIL” Gureva M.A., Butko V.V. System assessment of ecological and economic activity of PJSC "LUKOIL" // Journal of International Economic Affairs. — 2019. — Vol. 9. — № 3. — p. 2151-2164. — doi: 10.18334/eo.9.3.40952 Read more ›