Ku dhammee weedhan soo socda: Sannadkii 1975 dowladdii shuuciga ahayd ee Czechoslovakia waxay ka laabatay ruqsadii uu Duka u haystay inuu wadaad noqdo. Tan iyo markaas ilaa
Markii uu burburay nidaamkii 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.