Paintings and drawings referred Sorin donated to museums in the USSR
 

Scans directory. Ed. "Soviet Artist". 1973
Maybe it will be useful for someone.
Continuing on the link: http://forum.artinvestment.ru/blog.php?b=4601

I always thought (probably because of the patronymic), which is a testament to the artist's daughter gave these portraits, and now specifically looked, no, his widow Anna Stepanovna Sorin, presented the then Soviet museums twenty of his works, including a portrait of Chaliapin, Benoit , Fokine, self-portrait, a portrait of his wife is just a theater schedule Benoit