Cagatay Demiralp, John F. Hughes, and David H. Laidlaw.
Coloring 3D Line Fields Using Boy's Real Projective Plane
Immersion.
IEEE Trans. on Visualization and Computer Graphics (Proc.
Visualization '09), 15(6):1457-1463, 2009.
(pdf)
(bibtex:
Demiralp-2009-CLF).