On modeling the air traffic control coordination in the collision avoidance problem by mixed integer linear optimization Egileak: A. Alonso-Ayuso, L.F. Escudero, J. Martín-Campo Urtea: 2013 Aldizkaria: Annals of Operations Research Informazio gehigarria http://link.springer.com/article/10.1007/s10479-013-1347-y