Quadratic Outer Approximation for Convex Integer Programming with Box Constraints. - Christoph Buchheim; Long Trieu (SEA, 2013)

Active Set Methods with Reoptimization for Convex Quadratic Integer Programming. - Christoph Buchheim; Long Trieu (ISCO, 2014)

Continuous optimization methods for convex mixed-integer nonlinear programming - Long Trieu (2015)

A Feasible Active Set Method with Reoptimization for Convex Quadratic Mixed-Integer Programming. - Christoph Buchheim; Marianna De Santis; Stefano Lucidi; Francesco Rinaldi; Long Trieu (SIAM J. Optim., 2016)

A Frank-Wolfe based branch-and-bound algorithm for mean-risk optimization. - Christoph Buchheim; Marianna De Santis; Francesco Rinaldi; Long Trieu (J. Glob. Optim., 2018)