"Kleinert, Hagen"@en . . . "Hagen Kleinert (born 15 June 1941) is Professor of Theoretical Physics at the Free University of Berlin, Germany (since 1968),Honorary Doctor at theWest University of Timi\u015Foara, andat theKyrgyz-Russian Slavic Universityin Bishkek. He is alsoHonorary Member of theRussian Academy of Creative Endeavors."@en . "German physicist" . "Hagen Kleinert"@en . . . "1941-06-15Z"^^ . . . . "1941Z"^^ . . . . . .