https://www.vedomosti.ru/library/news/2006/04/12/mjert-sozdanie-birzhi-po-torgovle-neftyu-pozvolit-sokratit-razryv-cen-mezhdu-sortami-brent-i-urals?utm_source=telegram&utm_campaign=share&utm_medium=social&utm_content=mjert-sozdanie-birzhi-po-torgovle-neftyu-pozvolit-sokratit-razryv-cen-mezhdu-sortami-brent-i-urals