http://www.ej.ru/?a=note&id=32068
https://nv.ua/opinion/berezovets/trevozhnyj-sihnal-dlja-kremlevskoj-elity-2448771.html
https://nv.ua/opinion/yakovina_itogi/30-janvarja-kremlevskij-spisok-i-eho-posledstvija-2448840.html
https://nv.ua/opinion/radzihovsky/kremlevskij-doklad-uhroza-ili-piar-aktsija-2448786.html
https://ru.krymr.com/a/29006469.html
https://newtimes.ru/articles/detail/144164
http://www.rosbalt.ru/blogs/2018/01/30/1678377.html
Exploring why company turf wars and Western sanctions are preventing Russia from extracting oil and gas from the Arctic.
https://www.chathamhouse.org/expert/comment/russia-s-untapped-arctic-potential
https://www.svoboda.org/a/29004532.html