Sotheby's Russian auctions is in New York

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http://www.moria.hut1.ru/ru/almanah_06/01_05.htm
http://www.gesharim.org/books/?books_id=339
  "Odessa Parisians. Works of Art Nouveau from the collection of James Change "Catalog of the exhibition of paintings of the modernist from the collection of James Change in the Museum of Russian Art behalf of Mary and Michael Tsetlins in 2006. in Ramat Gan.
   This book provides the most complete information and a lot of good prints (I was on this show). Unfortunately very little is known about these excellent artists. Although most tragic. Many of them were just these pictures.