I do not know who was referring to the Czech " miracle worker " with Ibeya ( seller Divotvorny), but he ( much of my previous posts ) engaged in creative work under Vladimir Burliuk .
That there should be a famous portrait of Benedict Livshits try to copy and sign an AK

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Russian avantgarde drawing signed with initials on the lower right corner.Technic is mixed on paper.
Date of creation ca 1920 - 30 . Measurements: 34 x 28cm
PS. Vladimir Burliuk was killed on the fronts of the world in 1916 .