<bdi><a href="https://en.wikipedia.org/wiki/en:Ludwig_Dettmann" class="extiw" title="w:en:Ludwig Dettmann"><span title="German painter (1865-1944)">Ludwig Dettmann</span></a>
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<a rel="nofollow" class="external text" href="https://www.arcadja.com/auctions/de/author-lots/ugm9a1gz/search/7ph7g07q/">LEO SPIK, Berlin, 2021-06-24, lot 39, via Arcadja auctions results</a>