http://www.kasparov.ru/material.php?id=5C1242EB6DA97
https://www.kommersant.ru/doc/3828355
https://www.rbc.ru/newspaper/2018/12/12/5c0f85af9a794789ec25dc97
Is US Army Artillery progressing toward being able to outrange and outgun Russian and Chinese weapons
http://www.dsnews.ua/world/nikolas-maduro-i-ego-letuchie-rossiyskie-druzya-11122018220000
https://www.rbc.ru/newspaper/2018/12/11/5c09419b9a7947781ad3fa28
https://www.gazeta.ru/politics/2018/12/10_a_12089659.shtml
https://www.gazeta.ru/comments/column/bovt/12088873.shtml
https://www.gazeta.ru/social/2018/12/09/12088639.shtml
https://www.gazeta.ru/politics/2018/12/09_a_12088987.shtml