[3] From 1978 he taught business subjects at the Slovene language Technical School of Commerce in Gorizia, Italy.
The theory was rejected in academic circles, but nevertheless gained widespread popularity in Slovenia, as well as some interest abroad.
Already in the early 1980s, Šavli began to publish articles and essays that concerned in particular traditions of the Medieval state of Carantania.
In his books, Šavli emphasized the political and cultural continuity between the proto-Slovene state of Carantania and the later Duchy of Carinthia.
Šavli claims to have discovered the Black Panther as the coat of arms or symbol of Carantania.