These are sites that relate to Mark's work:
Agora Gallery Contemporary art gallery established 1984, located at the center of the New York Chelsea fine art galleries district. Art consulting services are provided to corporate and private art collectors. Collective exhibitions feature diverse contemporary art of various genres including painting, drawing, sculpture, photography and mixed media. Artist portfolios are reviewed.
To see an interview with Mark at the Brick Lane Gallery in March 2011 follow this link http://www.youtube.com/user/thebricklanegallery and go to Art in Mind 'Deep Focus' Part 1 (second interview).