An LP-based methodology for improved timing-driven placement. - Qingzhou (Ben) Wang; John Lillis; Shubhankar Sanyal (ASP-DAC, 2005)

A study of tighter lower bounds in LP relaxation based placement. - Qingzhou (Ben) Wang; Devang Jariwala; John Lillis (ACM Great Lakes Symposium on VLSI, 2005)