https://www.gazeta.ru/army/2019/01/24/12141265.shtml
https://www.inopressa.ru/article/24Jan2019/wsj/antiair.html
Russia’s tactics against the West, including election meddling and online disinformation, have drawn the most attention from lawmakers and the U.S. government. Proliferation of the S-400 system demonstrates how Russia is also investing heavily in traditional military firepower.
https://www.novayagazeta.ru/articles/2019/01/23/79282-kak-spasti-dogovor
http://www.ng.ru/armies/2019-01-23/1_7489_iskander.html
https://www.gazeta.ru/army/2019/01/23/12139705.shtml
https://www.kommersant.ru/doc/3861208
http://www.ng.ru/editorial/2019-01-22/2_7488_red.html
https://republic.ru/posts/92877
https://www.gazeta.ru/army/2019/01/20/12135877.shtml