Text of UBKh was published at least 11 times and good popularized but there is no scientific publication. To do this, one should verify the text with all known copies, establish their mutual dependence (may be able to find the autograph), identify the most authoritative copy, and so on. Prior to this work, we can not make any decisive conclusions about the discrepancies in the various publications.
It is an abstract of the chapter. For the full text see please ukrainian version.