Analysis of information sources in references of the Wikipedia article "Володимир Ольгердович" in Ukrainian language version.
The first coins, anonymous (Type I), roughly imitate Tatar coins of Jani beg struck in Gulistán in the years 1351-1353 (Kozubovs'kyi 1994). Kozubovs'kyi regarded them as the oldest coins of Volodymyr from the sixties to the early eighties but Khromov, while facing some recent finds ( or a find ) from the Sumy province, is of the opinion that they were struck earlier, between 1354-63 under the rule of the Ruirikid Prince Theodore of Kyiv, and that they were struck somewhere to the east of the capital town, in the Sumy region ( Khromov 2004 , 2006 ).
