This info can be found in several SVR biographies.
We are now also working in getting the info online.
An online database of concert programs in which Sergei participated would be great. Actually, I wish there were a site a la IMDb.com for concert programs, classical works, and performers.
If you do put his programs on web page, I recommend that you maintain them in a database from which you generate the web pages, so you can reuse the data in other forms.
I'd like to know, for example, whether he ever played any Ravel.