Geoestratégia russa

http://www.marketoracle.co.uk/Article49801.html

https://www.stratfor.com/video/wargaming-russias-military-options-ukraine

http://ohiostate.scout.com/forums/3159-the-nut-house/13086615-the-war-in-ukraine-thread-part-ii/ms/169276349?s=145&page=34