@Article{jue:11a,
author = {O. Aichholzer and F. Aurenhammer and T. Hackl and B. J\"uttler and M.\ Rabl and Z. \v{S}\'{\i}r},
title =  {Structural and Computational Advantages of Circular Boundary 
Representation},
journal = {Int. J. Comp. Geom. Appl.},
year = {2011},
volume = {21},
pages = {47-69},
DOI = {10.1007/s00200-011-0149-1}}