"1920Z"^^ . "1995-11-22Z"^^ . . . "Stechkin, Sergey Borisovich"@en . . . . "1995Z"^^ . "Sergey Stechkin"@en . . "Russian mathematician" . "Sergey Borisovich Stechkin (Russian: \u0421\u0435\u0440\u0433\u0435\u0301\u0439 \u0411\u043E\u0440\u0438\u0301\u0441\u043E\u0432\u0438\u0447 \u0421\u0442\u0435\u0301\u0447\u043A\u0438\u043D) (6 September 1920 \u2013 22 November 1995) was a prominent Soviet mathematician who worked in theory of functions (especially in approximation theory) and number theory."@en . . . "1920-09-06Z"^^ . .