TY - GEN A1 - Goworek, Tomasz A2 - Goworek, Jacek (1949- ). Red. PB - Wydaw. UMCS L1 - http://bc.umcs.pl/Content/22063/PDF/czas4051_69_1_2_2014_1.pdf L2 - http://bc.umcs.pl/Content/22063 KW - positronium KW - crystals media KW - polymers media KW - porous media KW - positron spectroscopy T1 - Positronium as a probe of small free volumes in crystals, polymers and porous media UR - http://bc.umcs.pl/dlibra/publication/edition/22063 ER -