<bdi><a href="https://en.wikipedia.org/wiki/en:Sergei_Vinogradov_(painter)" class="extiw" title="w:en:Sergei Vinogradov (painter)"><span title="Russian painter (1869-1938)">Sergey Vinogradov</span></a>
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1. The Athenaeum:  <a rel="nofollow" class="external text" href="http://www.the-athenaeum.org">Home</a> - <a rel="nofollow" class="external text" href="http://www.the-athenaeum.org/art/detail.php?ID=284444">info</a> - <a rel="nofollow" class="external text" href="http://www.the-athenaeum.org/art/full.php?ID=284444">pic</a><br>2. <a rel="nofollow" class="external text" href="https://www.mutualart.com/Artwork/At-the-Trough/74CC867898E9F4F7">MacDougall's, London, 5 June 2019, lot 157 via MutualArt</a>