Search for: [References = "42. Nazarczuk J.M., Umiński S., 2018. The impact of special economic zones on export behaviour. Evidence from Polish firm\-level data. E\+M Ekonomie a Management, vol. 21, no. 3, pp. 4‑22. https\:\/\/doi.org\/10.15240\/tul\/001\/2018\-3\-001"]