title: Editorial for the Special Issue on Combinatorial Optimization Problems.
authors.affiliation: University of M´laga, Spain chicano@lcc.uma.es.
authors.forename: Francisco
authors.initials: F
authors.lastname: Chicano
authors.affiliation: University of the Basque Country UPV/EHU, Spain christian.blum@ehu.es.
authors.forename: Christian
authors.initials: C
authors.lastname: Blum
authors.affiliation: University of Stirling, Scotland, UK gabriela.ochoa@cs.stir.ac.uk.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Ochoa
mesh_terms: D000465:Algorithms; D005075:Biological Evolution; D019295:Computational Biology / Q000379:methods