Świadek A, Szajt M. Impact of Innovation Expenditures on Manufacturing in Poland in 2006–2015 – Regional Diversification. Prace KGP PTG [Internet]. 2018 Sep. 19 [cited 2024 Apr. 28];32(3):54-68. Available from: https://prace-kgp.uken.krakow.pl/article/view/20801653.323.4