Today, I received the message below message from Sergej Popolsin’s wife:
Hello! best regards from Vienna, Austria. I am the wife of the blind Russian Painter Sergej Popolsin and found your site searching at Google for ‘popolsin’. Thanks for writing about him; I would like to add the address of his website with a lot of information about him and all paintings which are today available:http://www.popolsin.com
Sergej Popolsin’s painting
selmasgallery 
Best regards
Rosmarie Spitzer