+
+@article {LEMKE54,
+author = {Lemke, C. E.},
+title = {The dual method of solving the linear programming problem},
+journal = {Naval Research Logistics Quarterly},
+volume = {1},
+number = {1},
+publisher = {Wiley Subscription Services, Inc., A Wiley Company},
+issn = {1931-9193},
+url = {http://dx.doi.org/10.1002/nav.3800010107},
+doi = {10.1002/nav.3800010107},
+pages = {36--47},
+year = {1954}
+}
+
+
+@article{BARTELS69,
+ author = {R. H. Bartels and G. H. Golub},
+ title = {The simplex method of linear programming using {LU} decomposition},
+ journal = {Commun. ACM},
+ issue_date = {May 1969},
+ volume = {12},
+ number = {5},
+ month = may,
+ year = {1969},
+ issn = {0001-0782},
+ pages = {266--268},
+ numpages = {3},
+ url = {http://doi.acm.org/10.1145/362946.362974},
+ doi = {10.1145/362946.362974},
+ acmid = {362974},
+ publisher = {ACM},
+ address = {New York, NY, USA},
+ keywords = {LU decomposition, computational stability, linear programming, round-off errors, simplex method}
+}
+
+@article{BRAYTON70,
+ title={Some results on sparse matrices},
+ author={R. K. Brayton{,} F. G. Gustavson{,} and R. A. Willoughby},
+ journal={Mathematics of Computation},
+ volume={24},
+ number={112},
+ pages={937--954},
+ year={1970}
+}