1. Bertsekas D.P.: Nonlinear Programming. Athena Scientific, Belmont (1995)
2. Chung S.J.: NP-completeness of the linear complementarity problem. J. Optim. Theory Appl. 60, 393–399 (1989)
3. Cottle R.W., Dantzig G.: Complementary pivot theory of mathematical programming. Linear Algebra Appl. 1, 103–125 (1968)
4. Cottle R.W., Pang J.S., Stone R.E.: The Linear Complementarity Problem. Academic Press, New York (1992)
5. Mangasarian, O.L.: Absolute value equation solution via concaveminimization. Optim. Lett. 1(1), 3–8 (2007). ftp://ftp.cs.wisc.edu/pub/dmi/tech-reports/06-02.pdf