TY JOUR TI RESEARCH OF FACTORS AND CONDITIONS HAVING IMPACT ON ECOLOGICAL MANAGEMENT SYSTEM FUNCTIONING IN RUSSIAN COMPANIES KW environmental management system KW environmental protection KW study of factors and conditions KW oil and gas processing complex KW rational nature management JO Vestnik of Astrakhan State Technical University. Series: Economics AU Demidov, A.. AU Larionov, V.. AU Falco, S.. PY 2019 IS PB Astrakhan State Technical University