Ku qor sii wadida cutubkan - Sannadkii 1975-kii, dowladda shuuciga ah ee Czechoslovakia waxay ka laabatay oggolaanshaha Duka inuu u shaqeeyo wadaad. Laga soo bilaabo markaas ilaa uu nidaamku dhacay.
1989, Duka wuxuu u shaqeeyay naqshadeeye warshadda Škoda ee Plzeň. Dhanka kale, wuxuu si qarsoodi ah ugu shaqeeyay Amarka waxaana loo doortay gobolka Vicar Provincial wuxuuna adeegay 1975 ilaa 1987. Laga soo bilaabo 1976 ilaa 1981, wuxuu macallin ka ahaa cilmiga fiqi ahaaneed ee cilmiga fiqi ahaaneed ee Litoměřice. Sanadkii 1979, wuxuu ka qaatay shahaadada cilmiga fiqiga ee Kulliyadda Fiqiga ee St. John Baabtiisaha ee Warsaw, Poland.