RT Journal Article SR Electronic A1 Štěpánková, Bronislava A1 Emanovský, Petr T1 JF e-Pedagogium YR 2013 VO 13 IS 2 SP 7 OP 17 DO 10.5507/epd.2013.015 UL https://e-pedagogium.upol.cz/artkey/epd-201302-0002.php AB