Marxists Internet Archive
Marxists.org: Treaty of Brest Litovsk
This site provides a general overview of the Treaty of Brest-Litovsk (detailing the Russian view of the treaty). Content also includes the full text of the document itself.
Other
Russian Revolution Dates
This site is a good site on the Russian Revolution. Scroll to end and note Lenin's death and the resulting triumvirate of Stalin, Kamenev and Zinoviev.