<bdi><a href="https://en.wikipedia.org/wiki/en:Carl_Frederik_S%C3%B8rensen" class="extiw" title="w:en:Carl Frederik Sørensen"><span title="Danish artist (1818-1879)">Carl Frederik Sørensen</span></a>
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<a rel="nofollow" class="external text" href="http://www.arcadja.com/auctions/de/private/sorensen_carl_frederick/kunstwerken/27073/0/">Bruun Rasmussen, 31.05. 2016, lot 76 via ARCADJA auction results</a>