M. Branten, L. Roostalu, A. Hallik. "EVALUATING EFFICIENCY IN THE PUBLIC SECTOR: AN EXAMPLE OF ESTONIAN MINISTRIES." 6th SWS International Scientific Conference on Social Sciences ISCSS 2019, 2019, pp. 527-534. https://doi.org/10.5593/SWS.ISCSS.2019.2/S05.065