Freund, Robert M. SIAM Journal on Optimization Vol. 13, No. 4 (2003): 1004-1013. Working Paper.
Freund, Robert M. and Jorge R. Vera. Mathematics of Operations Research Vol. 28, No. 4 (2003): 625-648.
Xu, Sheng, Robert M. Freund, and Jie Sun. Computational Optimization and Applications Vol. 25, No. 1 (2003): 283-292.
Epelman, Marina, and Robert M. Freund. SIAM Journal on Optimization Vol. 12, No. 3 (2002): 627-655. Working Paper.
Nunez, Manuel A., and Robert M. Freund. SIAM Journal on Optimization Vol. 11, No. 3 (2001): 818-836. Working Paper.
Epelman, Marina, and Robert M. Freund. Mathematical Programming Vol. 88, No. 3 (2000): 451-485. Working Paper.