RT Journal Article SR Electronic A1 Špaček, Petr A1 Sedláčková, Tereza T1 JF e-Pedagogium YR 2014 VO 14 IS 2 SP 49 OP 60 DO 10.5507/epd.2014.017 UL https://e-pedagogium.upol.cz/artkey/epd-201402-0005.php AB