The Minimum Cooperative Guards Problem on K-spiral Polygons. - Bern-Cherng Liaw; N. F. Huang; Richard C. T. Lee (CCCG, 1993)

Plane Sweep Algorithms for the Polygonal Approximation Problems with Applications. - D. P. Wang; N. F. Huang; H. S. Chao; Richard C. T. Lee (ISAAC, 1993)