<bdi><a href="https://en.wikipedia.org/wiki/en:Anton_Dieffenbach" class="extiw" title="w:en:Anton Dieffenbach"><span title="German painter (1831-1914)">Anton Dieffenbach</span></a>
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<a rel="nofollow" class="external text" href="https://www.van-ham.com/datenbank-archiv/datenbank/anton-dieffenbach/rast-im-wald.html">Van Ham Kunstauktionen, Köln, , 18.11.2011, lot 197</a>