Shortened text of the section. Full text in ukrainian version
B. Cherkas Battle of Blue Water in 1362: a historical sketch. – Kiev, 2012. – 111 p.
B. Cherkas Western possession of the Jochi Ulus: political history, territorial-administrative structure, the economy, the city (13 – 14 cent.). – Kyiv: 2014. – 387 p.
Cherkas B. : Socio-political and economic development. – Kiev: a thesis… of Doctor of Historical Sciences, 2015. – 411 p.
So new that has brought B. Cherkas in the case of "Blue Water" – a mistake, and the old, that he borrowed from earlier studies – is also mistake.