-
http://www.rosugol.ru - Magazine " COAL "
-
http://www.sciteclibrary.ru - Library of state-of-the-art reviews
-
http://elektroinfo.ru - Magazine ELEKTRO-info
-
http://www.vme.expo.ru - Investment projects of the enterprises
-
http://tes.power.nstu.ru - Research of faculty of university
-
http://waste.com.ua - Scientific reports
-
http://db.niss.gov.ua - Clauses on ecology