<bdi><a href="https://en.wikipedia.org/wiki/en:Carl_Hasenpflug" class="extiw" title="w:en:Carl Hasenpflug"><span title="German artist (1802-1858)">Carl Hasenpflug</span></a>
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<a rel="nofollow" class="external text" href="http://www.sothebys.com/en/auctions/ecatalogue/2007/an-important-private-collection-from-hanover-am1020/lot.151.html">Sotheby's Amsterdam, 27-29 March 2007, lot 151</a>