Lizińska, W., R. Marks-Bielska, K. Babuchowska, and M. Wojarska. “Factors Contributing to the Institutional Efficiency of Local Governments in the Administrative Area”. Equilibrium. Quarterly Journal of Economics and Economic Policy, Vol. 12, no. 2, June 2017, pp. 339-53, doi:10.24136/eq.v12i2.18.