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Adolf Wüllner
<![CDATA[<br>Source: Wikipedia article <a href="https://ca.wikipedia.org/wiki/Adolf_W%C3%BCllner">Adolf Wüllner</a>]]>
Felix Klein
<![CDATA[<br>Source: Wikipedia article <a href="https://ca.wikipedia.org/wiki/Felix_Klein">Felix Klein</a>]]>
Francesc Carles de Velbrück
<![CDATA[<br>Source: Wikipedia article <a href="https://ca.wikipedia.org/wiki/Francesc_Carles_de_Velbr%C3%BCck">Francesc Carles de Velbrück</a>]]>
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