[Ashraf, T. & Rasool, S. (2013). Determinants of Leverage of Automobile Sector Firms Listed in Karachi Stock Exchange by Testing Packing Order Theory. Journal of Business Studies Quarterly, 4(3), ISSN 2152-1034. Retrieved 2 Sept, 2014 from http://jbsq.org/wpcontent/uploads/2013/03/March_2013_7.pdf]Search in Google Scholar
[Boguslauskas, V. (2004). Ekonometrikos pagrindai-Econometrics, Technologija, Kaunas.]Search in Google Scholar
[Cabinet of Ministers (2006). Regulation No. 571 on Guidelines for Energy Development during 2007-2016. Retrieved 6 Sept, 2014 from http://likumi.lv/doc.php?id=141070]Search in Google Scholar
[Durbin-Watson tables. Retrieved 25 Aug, 2014 from http://www,dm,unibo,it/~simoncin/Durbin_Watson_tables.pdf]Search in Google Scholar
[European Parliament and the Council (2009). On the promotion of the use of energy from renewable sources and amending and subsequently repealing Directives 2001/77/EC and 2003/30/EC. Retrieved 1 Sept, 2014 from http://eur-lex.europa.eu/legalcontent/EN/ALL/?uri=CELEX:32009L0028]Search in Google Scholar
[Fosberg, R. H. (2013). Short-Term Debt Financing During the Financial Crisis. International Journal of Business and Social Science, 4 (8), 1-5, Retrieved 1 Sept, 2014 from http://ijbssnet.com/journals/Vol_4_No_8_Special_Issue_July_2013/1.pdf]Search in Google Scholar
[Franklin, S. J. & Muthusamy, K. (2010). Determinants of Financial Leverage in Indian Pharmaceutical Industry. Asian Journal of Management Research, 2(1). Retrieved 26 Aug, 2014 from http://www.ipublishing.co.in/ajmrvol1no1/voltwo/EIJMRS2032.pdf]Search in Google Scholar
[Gill, A. & Mathur, N. (2011). Factors that Influence Financial Leverage of Canadian Firms. Journal of Applied Finance & Banking, 1(2), 19-37, ISSN: 1792-6580. Retrieved 1 Sept, 2014 from http://scienpress.com/upload/JAFB/Vol%201_2_2.pdf]Search in Google Scholar
[Gill, A. S., Mand, S. H., Sharma S. P., & Mathur, N. (2012). Factors that Influence Financial Leverage of Small Business Firms in India. International Journal of Economics and Finance, 4(3), 33-45. http://dx.doi.org/10.5539/ijef.v4n3p3310.5539/ijef.v4n3p33]Search in Google Scholar
[Graham, J. & Smart, S. (2011). Introduction to Corporate Finance. 3rd edition. 736 p.]Search in Google Scholar
[Gungoraydinoglua, A. & Öztekinb, Ö. (2011). Firm- and country-level determinants of corporate leverage: Some new international evidence. Journal of Corporate Finance, 17 (5), 1457-1474. Retrieve 25 Aug, 2014 from http://dx.doi.org/10.1016/j.jcorpfin.2011.08.00410.1016/j.jcorpfin.2011.08.004]Search in Google Scholar
[Hajiha, Z. & Akhlaghi, H. A. (2013). The Determinants of Debt Maturity Structure in Iranian Firms. African Journal of Business Management, 7(20), 1973-1982, ISSN 1993-8233.]Search in Google Scholar
[Jensen, M.C. & Meckling, W.H. (1976). Theory of the Firm: Managerial Behavior, Agency Costs and Ownership Structure. Journal of Financial Economics, 1958, Volume 3, No. 4, 305-360. http://dx.doi.org/10.1016/0304-405x(76)90026-x10.1016/0304-405X(76)90026-X]Search in Google Scholar
[Kalemli-Ozcan, S., Sorensen, B. & Yesiltas, S. (2012). Leverage across firms, banks, and countries. Journal of International Economics, Volume 88, Issue 2, 284-298. http://dx.doi.org/10.1016/j.jinteco.2012.03.00210.1016/j.jinteco.2012.03.002]Search in Google Scholar
[Kapil, Sh. (2011). Financial Management. Dorling Kindersley (India) Pvt. Ltd. 725 p.]Search in Google Scholar
[Kumar, R. (2008), Determinants of Firm's Financial Leverage: A Critical Review. Journal of Contemporary Research in Management, 3(1), 57-79. Retrieved 25 Aug, 2014 from http://www.psgim.ac.in/journals/index.php/jcrm/article/view/10/10]Search in Google Scholar
[Latvian Statistics (2014). Retrieved 1 Aug, 2014 from http://data.csb.gov.lv/pxweb/en/ekfin/ekfin__ikgad__uznemfin/?tablelist=true&rxid=a79839fe-11ba-4ecd-8cc3-4035692c5fc8]Search in Google Scholar
[Levitt, A. C., Kempton, W., Smith, A. P., Musial, V. & Firestone, J. (2011). Pricing offshore wind power, Energy Policy, 39 (10), 6408-6421. http://dx.doi.org/10.1016/j.enpol.2011.07.04410.1016/j.enpol.2011.07.044]Search in Google Scholar
[Modigliani, F. & Miller, M.H. (1958). The Cost of Capital, Corporation Finance and the Theory of Investment. The American Economic Review, 1958, Volume XLVIII, No. 3, 261-297.]Search in Google Scholar
[Myers, S.C. & Majluf, N. S. (1984). Corporate Financing and Investment Decisions When Firms Have Information That Investors Do Not Have. Journal of Financial Economics, 1984, Volume 13, No. 2, 187-221. http://dx.doi.org/10.1016/0304-405x(84)90023-010.1016/0304-405X(84)90023-0]Search in Google Scholar
[NASDAQOMX (2010). Įmonių finansinių rodiklių skaičiavimo metodika=Methodology for computation of financial indicators of companies. Retrieved 24 Aug, 2014 from http://www.nasdaqomxbaltic.com/files/vilnius/leidiniai/Rodikliu_skaiciavimo_metodika-final.pdf]Search in Google Scholar
[National Renewable Energy Action Plan of Latvia (2009). Retrieved 15 Sept, 2014, from http://ec.europa.eu/energy/renewables/action_plan_en.htm]Search in Google Scholar
[Ningsih, N. & Djuaeriah, N. (2013). The Capital Structure and Firm’s Financial Leverage in Indonesian Publicly Listed Cement Industry. Proceedings of World Business and Social Science Research Conference 24-25 October, 2013, Novotel Bangkok on Siam Square, Bangkok, Thailand. ISBN: 978-1-922069-33-7. Retrieved 31 Aug. 2014 from http://www.wbiworldconpro.com/uploads/bangkokconference-2013-october/finance/1382556355_318-Neneng.pdf]Search in Google Scholar
[Ross, S. (1977). The Determination of Financial Structure: The Incentive- Signalling Approach. The Bell Journal of Economics, 1977, Volume 8, No. 1, 23-40. http://dx.doi.org/10.2307/300348510.2307/3003485]Search in Google Scholar
[Sanchez-Vidal, F. J. (2014). High debt companies' leverage determinants in Spain: A quantile regression approach. Economic Modelling, 36, 455-465. http://dx.doi.org/10.1016/j.econmod.2013.08.04310.1016/j.econmod.2013.08.043]Search in Google Scholar
[Song, H. S. (2005). Capital structure Determinants: An Empirical Study of Swedish Companies. International PhD Workshop “Innovation, Entrepreneurship and Growth” at the Royal Institute of Technology (KTH) Stockholm, November 19-20. Retrieved 15 Sept, 2014 from http://www.divaportal.org/smash/get/diva2:565199/FULLTEXT01.pdf]Search in Google Scholar
[Tastan, H. (2012). Heteroscedasticity. Retrieved 3 Sept, 2014 from http://www.yildiz.edu.tr/~tastan/teaching/Handout%2008%20Heteroscedasticity.pdf]Search in Google Scholar