<bdi><a href="https://en.wikipedia.org/wiki/en:Carl_Wuttke" class="extiw" title="w:en:Carl Wuttke"><span title="German painter (1849-1927)">Carl Wuttke</span></a>
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<a rel="nofollow" class="external text" href="https://www.lempertz.com/de/kataloge/lot/1076-2/1567-carl-wuttke.html">Lempertz, Köln, Auktion 1076, 19.11.2016, Lot 1567</a>