Unfortunately I don't speak Russian well, so it may be tough to read what you have sent.

This is quality information, though. Valentin Sedov was a reknown archaeologist on Slavic settlements.

We cannot work out the identity of permanent settlers in the area before the 10th century. Yet, many people refer to the region (south-eastern Belarus, north-western Ukraine and eastern Poland) as the birthplace of Slavs. The main evidence to support the hypothesis of Slavs' birthplace in the area maybe linguistic.