Trust-region algorithms for derivative-free optimization and nonlinear bilevel programming. - Benoît Colson (4OR, 2004)

Bilevel programming: A survey. - Benoît Colson; Patrice Marcotte; Gilles Savard (4OR, 2005)

A Trust-Region Method for Nonlinear Bilevel Programming: Algorithm and Computational Experience. - Benoît Colson; Patrice Marcotte; Gilles Savard (Comput. Optim. Appl., 2005)

Optimizing partially separable functions without derivatives. - Benoît Colson; Philippe L. Toint (Optim. Methods Softw., 2005)

An overview of bilevel optimization. - Benoît Colson; Patrice Marcotte; Gilles Savard (Ann. Oper. Res., 2007)