Reference:
Covering a simple polygon by monotone directions (Hee-Kap Ahn, Peter Brass, Christian Knauer, Hyeon-Suk Na, Chan-Su Shin), In Comput. Geom., volume 43, 2010.
Bibtex Entry:
@article{journals/comgeo/Covering_a_simple_polygon_by_monotone_directions,
author = {Hee-Kap Ahn and
Peter Brass and
Christian Knauer and
Hyeon-Suk Na and
Chan-Su Shin},
title = {Covering a simple polygon by monotone directions},
journal = {Comput. Geom.},
volume = {43},
number = {5},
year = {2010},
pages = {514-523},
doi = {10.1016/j.comgeo.2009.11.002},
urlx = {http://www.ai6.uni-bayreuth.de/uploads/pdf/.pdf}
}