<bdi><a href="https://en.wikipedia.org/wiki/en:Ludwig_Gustav_Voltz" class="extiw" title="w:en:Ludwig Gustav Voltz"><span title="German animal and landscape painter (1825-1911)">Ludwig Gustav Voltz</span></a>
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<a rel="nofollow" class="external text" href="http://www.arcadja.com/auctions/de/private/voltz_ludwig_gustav/kunstwerken/29984/0/?rvn=3">Palais Dorotheum, Wien, 19.12.2014, lot 255 via ARCADJA auction results</a>