<bdi><a href="https://www.wikidata.org/wiki/Q27919274" class="extiw" title="d:Q27919274"><span title="German portrait and genre painter">Bernhard Zickendraht</span></a>
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1. <a rel="nofollow" class="external text" href="http://www.arcadja.com/auctions/de/private/zickendraht_bernhard/kunstwerken/384712/0/">Hampel Auctions, 30 Jun 2011, lot 444 via ARCADJA auction results</a><br>2. <a rel="nofollow" class="external text" href="https://www.hampel-auctions.com/a/Bernhard-Zeckendraht-1854-Hersfeld-1937-Berlin-Charlottenburg.html?a=85&amp;s=254&amp;id=91707">Hampel Auctions, 30 Jun 2011, lot 444</a>