## Working Papers

Sefair, J. A., Méndez, C. Y., Medaglia, A. L. and Zuluaga, L. F. Linear solution schemes for the mean-semivariance portfolio allocation model. Working paper.

Medaglia, A. L., Sefair, J. A. and Wilson, J. R. Generating correlated random vectors using mixed-integer programming. Working paper.

Ramírez, M. A., Medaglia, A. L. and J. E. Mendoza. A column generation-based heuristic for two-dimensional cutting stock problems with variable dimensions. Working paper.

González, J. E., Lozano, L., Walteros, J. L., Feillet, D., and Medaglia, A. L.. Solving the bus rapid transit route design problem with general topologies via simultaneous column and cut generation. Working paper.

García, A. F., Medaglia, A. L., Restrepo, M. I. and Fowler, J. W. Staff task assignment in healthcare centers. Working paper.

Duque, D., Lozano, L. and Medaglia, A. L. (2013). An exact method for the biobjective shortest path problem. Under review.

Lozano, L., Duque, D., & Medaglia, A. L. (2013). An exact algorithm for the elementary shortest path problem with resource constraints. Under review.

Duque, D., Lozano, L. & Medaglia, A. L. (2013). Solving the orienteering problem with time windows via the pulse framework.

Gómez, A., Mariño, R., Akhavan-Tabatabaei, R. Mendoza, J. E., & Medaglia, A. L. (2013). A flexible framework for vehicle routing problems with stochastic travel and service times.

Pillac, V., Guéret, C., and Medaglia, A. L. (2012). A fast reoptimization approach for the dynamic technician routing and scheduling problem. Under review.

COPA supports the decision making process at organizations via the analysis, design and application of operations research (OR) and statistical computer-based techniques. Our purpose is to contribute to the scientific and technological development of Colombia, becoming a leading group in R&D.