Negative Cycle Detection Problem. - Chi-Him Wong; Yiu-Cheong Tam (ESA, 2005)

Analog placement with symmetry and other placement constraints. - Yiu-Cheong Tam; Evangeline F. Y. Young; Chris C. N. Chu (ICCAD, 2006)

Simultaneous Handling of Symmetry, Common Centroid, and General Placement Constraints. - Qiang Ma 002; Linfu Xiao; Yiu-Cheong Tam; Evangeline F. Y. Young (IEEE Trans. Comput. Aided Des. Integr. Circuits Syst., 2011)