<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="http://www.kettererkunst.de/kunst/kd/details.php?obnr=115000426&amp;anummer=422&amp;detail=1">Ketterer, München, Auktion 422, 22.05.2015, Lot 304</a>