http://www.kasparov.ru/material.php?id=5C24761BB6C67
https://www.radiosvoboda.org/a/ukraina-hotova-do-povnomasshtabnoi-viyny-ihor-romanenko/29679632.html
https://lb.ua/world/2018/12/27/415907_morskiy_vimir_gibridnoi_viyni.html
https://www.inopressa.ru/article/25Dec2018/newsweek/attack.html
https://www.kommersant.ru/doc/3842391
Regional experts also predicted that Russia may look to take advantage of the uncertainty created by James Mattis's resignation as President Trump's defense secretary.
https://www.newsweek.com/ukraine-russia-war-attack-christmas-1270621