gauguin sotheby's vs abelardo muñoz

http://www.nashersculpturecenter.org/images/collection/7_Zoom.jpg
http://www.richardnathanson.co.uk/Gauguin_Clovis_by_a_Stream_oil.jpg
http://www.skeptically.org/sitebuildercontent/sitebuilderpictures/dali-gala-leda-swan070.jpg