Paul Dibb has an essay on the recently released Russian outline of its nuclear deterrence policy. It's inevitably a bit general and vague, but still: "This is the first time in the almost 30-year history of the Russian Federation that an explanation of Russia’s nuclear warfighting policy has been made public."

Kingston Reif from the Bulletin of the Atomic Scientists has an interesting article looking at  spending on the US nuclear arsenal, with links to take the reader deeper into the debate.