Anyone Googling on a Vainberg-Shostakovich connection would probably
find the following website, the content of which is an interesting
article written by the late Ian MacDonald.  An enticing snippet:

   "The Seventh Symphony is a fascinating instance of Vainberg and
   Shostakovich treading so closely in each other's footsteps that
   it is hard to distinguish who is following whom."

   http://www.siue.edu/~aho/musov/vainberg/vainberg.html

Back up one level for more on Shostakovich and "Music under Soviet Rule".

   http://www.siue.edu/~aho/musov/musov.html

Rick Mabry
Shreveport, LA