A simple but effective improvement to the plumb-line algorithm.

Ralf Hartmut Güting Zhiming Ding A simple but effective improvement to the plumb-line algorithm. 251-257 2004 91 Inf. Process. Lett. 6 http://dx.doi.org/10.1016/j.ipl.2004.05.015 db/journals/ipl/ipl91.html#GutingD04