Analysis of information sources in references of the Wikipedia article "Tokay" in Vietnamese language version.
The wine not only retains its sweet taste without any brandy being added to it to check the fermentation, but it goes on improving for many years, longer by far than any other unfortified wine. This, however, only applies to the best wine of Tokay (Tokaj), Tokay Essencia. Before 1918 the finest Tokay Essencia was never sold but reserved for the Imperial cellars of the Habsburgs; hence its name of Imperial Tokay. Next in order of excellence come the Tokay Aszu, also called Tokay Ausbruch and the Tokay Szamorodner.
