[National composition of the population of the Russian Federation in 2010]. Russian Federation – Federal State Statistics Service (in Russian). Retrieved 3 June 2016. ↑ Украинцы в России: еще братья, но уже гости - О "средне-потолочной" гипотезе про 4 миллиона "заробітчан" в РФ и бесславном конце "Родной Украины" [Ukrainians in Russia: still brothers, but now guests – On the "medium ceiling" hypothesis on 4 million "(Ukrainian) workers" in the RF and the inglorious end of "Mother Ukraine"] (in Russian).