School Studies Science Employees Graduates Unknown error Requested page not found. You can search the site or go to the start page. Search ... home page If the problem persists, contact the site administrator. # 404 Article not found ul. Warszawska 24, 31-155 Kraków phone: 12 628 20 00, fax: 12 628 20 71 e-mail: kancelaria@pk.edu.pl