Jesús David Beltrán Jose Eduardo Calderón Rayco Jorge Cabrera José A. Moreno-Pérez J. Marcos Moreno-Vega GRASP-VNS hybrid for the Strip Packing Problem. 79-90 2004 conf/hm/2004 Hybrid Metaheuristics http://iridia.ulb.ac.be/~hm2004/proceedings/p09.pdf db/conf/hm/hm2004.html#BeltranCCPV04