https://www.inopressa.ru/article/25Dec2018/newsweek/attack.html
http://www.rosbalt.ru/world/2018/12/25/1755291.html
https://www.gazeta.ru/politics/2018/12/25_a_12107827.shtml
http://www.ng.ru/cis/2018-12-25/1_7473_moldavia.html
https://www.kommersant.ru/doc/3842141
https://www.kommersant.ru/doc/3842396
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