1.Holst on cardboard, maslo.40-45, 5.1947god.
Conclusion D. Gorbachev.
2.Holst on cardboard, maslo.24 ,5-26 .1940-e.
Attributed D. Gobachovym works;
official site;
www.keytoart.org.ua
Tretyakov Gallery (Moscow): Dating of recent works by Malevich.
Museum of Russia (St. Petersburg): Dating of recent works by Malevich.
Museum of Modern Art, New York (Modern Art Museum, New York): dating works Bogomazova "Tyrsonostsy.
National Art Museum of Ukraine (Kiev): atributirovanie works Exter, Gregory Levitsky, Bogomazova, Svyatoslavskaya, Malevich, Lisitsky, Moeller.
Auction Sotheby's (Munich branch): atributirovanie works Bogomazova.
Auction Bonham's: atributirovanie works of Samuel Adlivankin, D. Zagoskina. More ...
MacDougall's Auction.
Auction Christie's (Paris office): atributirovanie Exter.
Auction Phillips: atributirovanie works Exter, Bogomazova.
Museum of Performing Arts (Kiev): atributirovanie and dating of works Petritsky.
Theater Museum. Bakhrushin: (Moscow): dating works Petritsky and Møller.
Literary Museum (Moscow): atributirovanie poster Petritsky.
Museum of Modern Art (Lodz): atributirovanie works Tsybisa.
Collection Lobanov-Rostovsky (Lobanov-Rostovsky), London, curator of the collection of Professor John Boult (John Bowlt): atributirovanie works Petritsky, Khvostenko-Khvostov Yermilov, Tischler.