LOZYNSKYY, Roman, PANTYLEY, Viktoriya and SAWICKA, Anna. Smart city concept in Poland and Ukraine: implementation instruments, problems and successes of cities. Bulletin of Geography. Socio-economic Series. Online. 22 February 2021. No. 52, pp. 95-109. [Accessed 18 July 2024]. DOI 10.2478/bog-2021-0016.