KISIEL, R.; KOWALEWSKA, A.; KOWALEWSKA, J. IMPACT OF IMPLEMENTED INNOVATIONS ON COMPETITIVENESS OF TOURISM COMPANIES IN THE WARMIƃSKO-MAZURSKIE VOIVODESHIP. Acta Scientiarum Polonorum. Oeconomia, v. 19, n. 4, p. 87-94, 3 Jan. 2021.