1. Federal State Statistics Service, http://www.rosstat.gov.ru/
2. Bank of Russia, http://www.cbr.ru/
3. Ministry of Finance, http://www.minfin.gov.ru/
4. World Bank database, https://data.worldbank.org
5. Gitman L.J., Joehnk M.D., Fundamentals of investing (Pearson, London, 2004)