▁he ▁sang ▁from ▁ 1 9 6 6 ▁until ▁ 1 9 6 8 ▁in ▁Dat sch a , ▁also ▁in ▁Hamburg . ▁Ar ound ▁this ▁time , ▁he ▁received ▁a ▁contract ▁to ▁sing ▁in ▁New ▁Orleans ▁with ▁P aglia c ci . ▁In ▁early ▁ 1 9 6 3 ▁he ▁performed ▁in ▁La ▁Scala ▁in ▁Philadelphia . ▁He ▁gave ▁also ▁concert s ▁in ▁Fri ends ▁Academy ▁in ▁New ▁York ▁with ▁Lud m illa ▁Az ova . ▁ ▁From ▁ 1 ▁September ▁ 1 9 6 3 ▁to ▁ 3 1 ▁August ▁ 1 9 6 4 , ▁Min sky ▁collabor ated ▁with ▁the ▁G els enk ir chen ▁Opera . ▁Although ▁under ▁contract ▁with ▁the ▁Don ▁C oss ack ▁Ch oir ▁Serge ▁Jar off ▁and ▁its ▁conduct or ▁from ▁ 1 9 4 8 ▁on wards , ▁it ▁was ▁only ▁late ▁in ▁ 1 9 6 4 ▁that ▁he ▁could ▁join ▁the ▁Don ▁C oss ack ▁Ch oir ▁Serge ▁Jar off ▁in ▁Lu z ern . ▁He ▁would ▁remain ▁with ▁Jar off ▁until ▁spring ▁ 1 9 7 9 . ▁On ▁ 2 2 ▁April ▁ 1 9 6 6 , ▁Min sky ▁performed ▁once ▁again ▁at ▁the ▁Mans onic ▁Aud itor ium ▁in ▁Detroit . ▁At ▁that ▁time ▁Min sky ▁was ▁already ▁sp ending ▁most ▁of ▁his ▁time ▁in ▁Europe . ▁ ▁Australia ▁In ▁ 1 9 7 2 , ▁Min sky ▁tou red ▁Australia ▁and ▁produced ▁a ▁series ▁of ▁records ▁with ▁the ▁Vienna ▁Sym phony ▁Orchestra . ▁In ▁ 1