http://www.ng.ru/editorial/2018-09-03/2_7302_red.html
https://carnegie.ru/commentary/77147
http://www.ng.ru/ideas/2018-09-02/5_7301_rating.html
http://www.ng.ru/politics/2018-09-03/100_vciom_elect.html
https://nv.ua/opinion/shenderovych/tochka-nevozvrata-dlja-putina-i-rossii-2491964.html
Meanwhile, sanctions on trade and ordinary private companies should be avoided, as they hit ordinary Russians.
http://thehill.com/opinion/international/404524-want-to-hit-putin-where-it-hurts-target-his-friends
https://ru.krymr.com/a/kvn-aksenova-razborki-v-sovmine-kryma/29466392.html