"Erich Kamke (August 18, 1890 \u2013 September 28, 1961) was a German mathematician, who specialized in the theory of differential equations. Also, his book on set theory became a standard introduction to the field."@en . "Erich Kamke"@en . . . . "1890-08-18Z"^^ . . . . . "1961-09-28Z"^^ . . . "1961Z"^^ . . . "Kamke, Erich"@en . "German mathematician" . . "1890Z"^^ . .