Does financial support from the EU structural funds has impact on the firms’ performance : evidence from EstoniaHartšenko, Jelena; Sauga, AkoProceedings of 30th International Conference Mathematical Methods in Economics : Karvina, Czech Republic, 11–13 September 2012. Part 12012 / p. 260-265 http://mme2012.opf.slu.cz/proceedings/pdf/045_Hartsenko.pdf