In the book of Martin Bielski story of the Battle of the Vorskla comes directly after considered me story of "a campaign to Don," in an article in 1397.
Text: . – 1551, l. 230; Kronika tho iesth, Historya swiátá. – Kraków: 1564
In characteristic names Bogush and Aksak we see that Martin Belsky abbreviated text Miechowita, but did it so casually, that it placed in wrong year (although there is an article of 1399), and the text has turned a less understandable.
Full text of section – in the Ukrainian version.