The first drawing by Leonid Soyfertis that I found (on Pinterest) was the one with the children crossing the street. The caption was in cyrillic, as with most of the others I found.
I haven't in fact been able to find out very much about him, except he worked/works as an illustrator and cartoonist.
But what friendly drawings! He lovingly depicts daily life in Russia.
I would have liked to have shown all his work..