http://www.kasparov.ru/material.php?id=5C191EE4EB437
https://www.gazeta.ru/army/2018/12/18/12099847.shtml
https://www.gazeta.ru/social/2018/12/17/12097393.shtml
https://www.bbc.com/russian/features-46559474
https://www.kommersant.ru/doc/3828355
Is US Army Artillery progressing toward being able to outrange and outgun Russian and Chinese weapons
https://www.rbc.ru/newspaper/2018/12/11/5c09419b9a7947781ad3fa28