As a service to Lawfare readers, we have compiled some other web commentary on the legal aspects of the crisis in Crimea. (Of course, interested folks should have a look at Ashley's thorough articulation of the international law issues at play, and Paul's take on the invasion's cyber dimension.)
While the situation percolated over the weekend, Eric Posner noted the (somewhat surprising) dearth of academic commentary on the implications of Russia's military intervention for international law. He summarized his own views succinctly:
1. Russia’s military intervention in Ukraine violates international law.
2. No one is going to do anything about it.