RT Journal Article SR Electronic A1 Zelenková, Dagmar T1 JF Aura musica YR 2013 VO 3 IS 1 SP 4 OP 11 UL https://aura.ujep.cz/en/artkey/aum-201301-0001.php AB The study of the agility of the voice in the initial phase mainly focused on mastering simple moving exercises in the middle range. Perfect agility being developed further using appropriately selected vocalize and solfeggio.