Rate please 2 paintings
 

Good day!

Please help identify the authors and the potential value of these paintings.

And what is the difficulty of determining authorship?
By signing - Semen Fedorovich Fedorov, Voronkov Vasily Zhukovsky.
More precisely - the expertise give.
The works of both are often surfaced at auction, the problems with more or less objective assessment should not be.
All the best!

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