Here are some links you might find helpful, or entertaining. 

 -The official Mondrian Trust website

http://www.mondriantrust.com/

-Professor Roann Barris, Radford University

http://www.radford.edu/~rbarris/art428/MondriananddeStijl.html

http://www.radford.edu/~rbarris

-Houston Art Scene

http://www.di4arts.com/dewport/houstonart.html

-The Art List Website

http://www.theartlist.com

 -The Art Business

http://www.artbusiness.com