le ▁( 1 9 7 0 ), ▁( trans . ▁Roger ▁Parker , ▁ 1 9 8 0 ), ▁The ▁Story ▁of ▁Giuseppe ▁Ver di : ▁Ober to ▁to ▁Un ▁Bal lo ▁in ▁Mas ch era . ▁Cambridge , ▁et ▁al : ▁Cambridge ▁University ▁Press , ▁ 1 9 8 0 . ▁▁ ▁Bud den , ▁Julian ▁( 1 9 8 4 ), ▁ ▁The ▁Oper as ▁of ▁Ver di , ▁Volume ▁ 1 : ▁From ▁Ober to ▁to ▁R igo let to . ▁London : ▁Cass ell . ▁. ▁C ald well , ▁Sarah ▁& ▁Reb e cca ▁Mat lock ▁( 2 0 0 8 ), ▁Ch alleng es : ▁A ▁Mem oir ▁of ▁My ▁Life ▁in ▁Opera , ▁M idd let own , ▁Connecticut : ▁Wes ley an ▁University ▁Press . ▁. ▁G os sett , ▁Philip ▁( 2 0 0 6 ), ▁Div as ▁and ▁Sch ol ars : ▁Perform ing ▁Italian ▁Opera , ▁Chicago : ▁University ▁of ▁Chicago . ▁▁ ▁Hans ell , ▁Kath le en ▁K uz m ick ▁( 2 0 0 3 ), ▁ ▁" Introduction ▁to ▁the ▁Crit ical ▁Edition ▁of ▁St iff el io , ▁Chicago : ▁The ▁University ▁of ▁Chicago ▁Press ▁and ▁Milan : ▁Casa ▁Ric ord i . ▁K ess ler , ▁Daniel ▁( 2 0 0 8 ). ▁Sarah ▁C ald well ; ▁The ▁First ▁Woman ▁of ▁Opera , ▁p .   2 3 6 . ▁Lan ham , ▁Maryland : ▁The ▁Sc are c row ▁Press . ▁ ▁Kim bell