I’ve run the literature search, and there’s nothing in English on brewing in the former USSR. There’s not really anything in Russian either. It seems it’s worth doing.
Bile (pronounced with a terminal ye) is the Ukrainian word for white. The Russian equivalent is Beloe. I’ve had stacks of these in Moscow and Petersburg, and yes, they do fall between an American Wheat and a Berlinerweisse.
After looking at the information here: Serebrianka (21045) it looks like it very well could be an old continental variety with the tiny sidearms and low alpha and cohumulone. The problem with many of these older varieties is that they are generally really poor producers no matter where they’re grown.