Dirck Helmbreker on Wikipedia
External resources
- http://www.artnet.com/artist/554573/dirk-helmbreker.html
- http://www.christies.com/LotFinder/searchresults.aspx?toogle=p&entry=Dirck+Helmbreker&action=search&sid=7697bf61-4b74-4123-8247-360ec0916f0a&searchtype=p#toogle=p&entry=Dirck+Helmbreker&action=refine&sid=7697bf61-4b74-4123-8247-360ec0916f0a&searchtype=p