<bdi><a href="https://en.wikipedia.org/wiki/en:Paul_Baum_(artist)" class="extiw" title="w:en:Paul Baum (artist)"><span title="German painter (1859-1932)">Paul Baum</span></a>
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1. Sotheby's eCatalogue (ehemals LA County Museum of Art)<br>2. <a rel="nofollow" class="external text" href="http://www.sothebys.com/en/auctions/ecatalogue/2009/19th-century-european-paintings-including-german-austrian-central-european-paintings-the-orientalist-sale-spanish-painting-and-the-scandinavian-sale-l09661/lot.25.html">Sotheby's London, 03 June 2009, lot 25</a>