Headgear wheel and drum linings $modar®$ manufactured in Poland / Józef HANSEL // W: TIORIR'11 : integrated international symposium : ISTI, ORRE i IRSE : 8\textsuperscript{th} International symposium Mine haulage and hoisting ISTI'11 ; International symposium Sustainable development of mining and energy industry ORRE'11 : September 11–15, 2011 Zlatibor : proceedings, Vol. 1 / ed. Miloš Grujić. — Beograd : Univerzitet u Beogradu. Rudarsko-geološki fakultet, 2011. — ISBN: 978-86-7352-257-9. — S. 65–74. — Bibliogr. s. 74, Abstr., Apstr.