E. Molendowski, K. Nawracaj-Grygiel, and M. Ulbrych, “The competitiveness of manufacturing in Poland and the other V4 countries against the backdrop of digital transformation challenges”, EEJTR, vol. 6, no. 1, pp. 7–22, Apr. 2023, doi: 10.15290/eejtr.2022.06.01.01.