https://www.vedomosti.ru/business/news/2016/04/04/636308-novak-o-visokih-riskah-avarii-na-ugolnih-shahtah-rossii?utm_source=telegram&utm_campaign=share&utm_medium=social&utm_content=636308-novak-o-visokih-riskah-avarii-na-ugolnih-shahtah-rossii