Kisiel, Roman, et al. “Analysis of Strengths and Weaknesses of Business Environment Institutions from Warmia-Masurian Voivodeship As Well As Opportunities and Threats for Their Operations”. Equilibrium. Quarterly Journal of Economics and Economic Policy, vol. 6, no. 1, Mar. 2011, pp. 109-24, doi:10.12775/EQUIL2011.006.