@TechReport{proofstechreport, 
  title =        {{D}elaunay quadrangulation by two-coloring vertices --- extended version with quad-quality proofs appendix},
  author = {Scott A. Mitchell and Mohammed A. Mohammed and Ahmed H. Mahmoud and Mohamed S. Ebeida},
  year =         2014,
  institution =  {Sandia National Laboratories},
  pages = {21 online},
  number =       {SAND2014-16625C},
  note = {Available at \url{http://www.cs.sandia.gov/~samitch/bibliography_2007.html}},
}

@article{proceedings,
  title =        {{D}elaunay Quadrangulation by Two-coloring Vertices},
  author = {Scott A. Mitchell and Mohammed A. Mohammed and Ahmed H. Mahmoud and Mohamed S. Ebeida},
 volume={8},
 year={2014},
 pages={364-376},
 journal={Procedia Engineering},
 publisher={Elsevier},
 note = {Proceedings of the 23rd International Meshing Roundtable. Freely available online at Science Direct.
         For the quad-quality proofs, see the Sandia tech report version at \url{http://www.cs.sandia.gov/~samitch/bibliography_2007.html}},
 }
% booktitle={Proceedings of the 23rd International Meshing Roundtable.}
% editor={Josep Sarrate and Matthew Staten},
% organization={Sandia National Laboratories},
% ISBN={978-3-319-02335-9},