[1. Chmielniak T.: Steam turbines: theoretical background (in Polish). Wydawnictwo Politechniki Śląskiej (Publishing House of Silesian University of Technology),Gliwice, 1998]Search in Google Scholar
[2. Kaszowski P.: Analysis of operation of labyrinth seals with extraction (in Polish). M.Sc. Thesis, Gdańsk University of Technology, Department of Energy Engineering and Industrial Apparatures, Gdańsk, 2011]Search in Google Scholar
[3. Krzyślak P., Winowiecki M.: A method of diagnosing labyrinth seals in fluid-flow machines. Polish Maritime Research 3(57) Vol. 15, 2008, pp. 38-4110.2478/v10012-007-0081-2]Search in Google Scholar
[4. Perycz S.: Steam and gas turbines (in Polish). Wydawnictwo Politechniki Gdańskiej (Publishing House of Gdańsk University of Technology), Gdańsk 1988]Search in Google Scholar
[5. Trutnovsky K.: Beruhrungsfreie Dichtungen, Grundlagen und Anwendungen der Stromung durch Spalte und Labirynthe (in German). VDI - VERLAG bh; (Verlag des Vereins Deutscher Ingeniuere), Dusseldorf, 1964]Search in Google Scholar