A Century Of Capital Structure: The Leveraging Of Corporate America

http://www.valuewalk.com/2015/04/a-century-of-capital-structure-the-leveraging-of-corporate-america/

Russia's Gazprom sees profits collapse on low oil and weak ruble - Apr. 29, 2015

http://money.cnn.com/2015/04/29/news/companies/gazprom-oil-results/