Marshall W. Bern, David Eppstein, Paul E. Plassmann, F. Frances Yao. Horizon Theorems for Lines and Polygons. In Jacob E. Goodman, Richard Pollack, William Steiger, editors, Discrete and Computational Geometry: Papers from the DIMACS Special Year. Volume 6 of DIMACS Series in Discrete Mathematics and Theoretical Computer Science, pages 45-66, DIMACS/AMS, 1990.
Abstract is missing.