Title: Imperii chetyrekh
Subjects: Biography, Capitalists and financiers
Places: Russia (Federation)
People: B. A. Berezovskiĭ (1946-), Mikhail Khodorkovskiĭ (1963-), V. I︠U︡ Alekperov (1950-), Vladimir Olegovich Potanin (1961-)