https://jamestown.org/program/russias-caspian-flotilla-gains-an-air-arm/
http://www.dsnews.ua/politics/nepolnotsennoe-vozmezdie-pochemu-bolshinstvo-rossiyskih-28052019090000
https://www.gazeta.ru/army/2019/05/14/12353431.shtml
https://www.kommersant.ru/doc/3967143
https://www.gazeta.ru/army/2019/05/10/12348151.shtml
https://www.gazeta.ru/politics/2019/05/09_a_12346627.shtml
The Kremlin has gone all-in on projecting an image of new strength — and part of that has been a rebirth of Russian naval activity across the board. In an exclusive interview with Defense News, a U.S. Navy officer and an American diplomat describe the state of relations between the two nations.
http://www.ng.ru/columnist/2019-05-02/100_190502_columnist.html