, ▁she ▁has ▁tou red ▁and ▁performed ▁in ▁festiv als ▁in ▁Austria , ▁Bulg aria , ▁the ▁Czech ▁Republic , ▁France , ▁Germany , ▁Hung ary , ▁Italy , ▁Mold ova , ▁Mor oc co , ▁the ▁Netherlands , ▁Poland , ▁Portugal , ▁Slov ak ia , ▁Spain , ▁Sweden , ▁Switzerland , ▁the ▁United ▁States , ▁and ▁Y ug oslav ia . ▁St ol er iu ▁has ▁performed ▁for ▁four ▁dec ades ▁and ▁served ▁as ▁a ▁jur or ▁in ▁international ▁compet itions ▁including ▁such ▁ven ues ▁as ▁▁ 1 9 8 6 ▁International ▁Sing ing ▁Compet ition ▁" Spring time ▁in ▁Prag ue ", ▁the ▁ 2 0 0 3 ▁International ▁George ▁En es cu ▁Compet ition ▁in ▁Buch ar est , ▁and ▁the ▁ 2 0 0 7 ▁International ▁V ocal ▁Compet ition ▁in ▁Mal m ö , ▁Sweden . ▁ ▁She ▁began ▁teaching ▁in ▁the ▁early ▁ 1 9 8 0 s ▁at ▁D inu ▁Lip atti ▁High ▁School , ▁and ▁later ▁became ▁a ▁visit ing ▁associate ▁teacher ▁in ▁voice ▁at ▁the ▁National ▁University ▁of ▁Music ▁Buch ar est . ▁She ▁has ▁taught ▁master ▁courses ▁in ▁the ▁Czech ▁Republic , ▁Roman ia , ▁and ▁the ▁United ▁States ; ▁taught ▁at ▁the ▁Lith uan ian ▁Academy ▁of ▁Music ▁and ▁Theatre ▁in ▁Vil nius ▁in ▁ 2 0 0 4 ; ▁and ▁has ▁run ▁a ▁studio ▁for ▁the ▁study ▁of ▁early ▁music ▁for ▁many ▁years . ▁Her ▁students ▁have ▁accum ulated ▁over ▁ 5 0 ▁international ▁voice ▁awards . ▁ ▁In ▁