Christian Kanzow,
Houduo Qi and Liqun Qi:  On the minimum norm
solution of linear programs.  Journal of Optimization
Theory and Applications 116, 2003, pp. 333-345
@article{Kanzow2003-2, 
author = {Christian Kanzow and Houduo Qi and Liqun Qi}, 
title = {On the minimum
norm solution of linear programs.}, 
journal = {Journal of Optimization
Theory and Applications},
volume = {116},
year = {2003}, 
pages = {333-345}, 
}