Mark Jarrett, “The Struggle for Poland in the Congress of Vienna”, in History Today, vol. 64, no. 12 (December 2014), pp. 39-44 [online edition here]:
“…Vladimir Putin is by no means the first Russian leader to threaten his neighbours with force and annexations. Two centuries ago European statesmen faced a similar predicament. Only then it was Poland at stake, not Ukraine, as Mark Jarrett explains…”