M. Furtak-Niczyporuk, P. Książek, B. Drop, E. Warchoł-Sławińska, A. Fałkowski, and P. Okoński, “Investments in health care with the use of EU funds”, Pol J Public Health, vol. 122, no. 4, pp. 370–376, Dec. 2012, doi: 10.12923/j.0044-2011/122-4/a.07.