[Alenka]

Tjutchev, thank you for the work done. Your question certainly have a right to exist. From my side it would be foolish to tear his shirt on his chest and beat his chest, proving the authenticity of expertise. If you are interested in this job and you are considering the possibility of acquiring it, why do not you contact the State Tretyakov Gallery, and to confirm (or deny) this conclusion, and find out why and on what grounds the experts to draw such conclusions about the authenticity, and why did not indicate "on the incontestable work, based on which they came to his conclusion."
Otherwise, doubts about the authenticity immet right to exist, but unfortunately, groundless.
And the issues raised by you, rather to the experts, not me .....