https://www.svoboda.org/a/29663222.html
https://www.inopressa.ru/article/18Dec2018/nzz/tih.html
https://www.gazeta.ru/army/2018/12/18/12099847.shtml
http://www.ng.ru/politics/2018-12-18/3_7465_istina.html
http://www.ng.ru/week/2018-12-16/7_7463_weekpolit.html
https://www.rbc.ru/newspaper/2018/12/14/5c127c2e9a7947804f8a311d
Is US Army Artillery progressing toward being able to outrange and outgun Russian and Chinese weapons
https://carnegie.ru/commentary/77925
http://www.ng.ru/politics/2018-12-11/100_ER111218.html