Marks-Bielska, R., and D. Opalach. “DIFFERENCES IN THE LEVEL OF ENTREPRENEURSHIP AMONG MUNICIPALITIES OF THE WARMIŃSKO-MAZURSKIE PROVINCE IN POLAND”. Acta Scientiarum Polonorum. Oeconomia, Vol. 18, no. 1, Mar. 2019, pp. 53-62, doi:10.22630/ASPE.2019.18.1.6.