María-Victoria Belmonte José-Luis Pérez-de-la-Cruz Francisco Triguero Ruiz Ontologies and agents for a bus fleet management system. 1351-1365 2008 34 Expert Syst. Appl. 2 http://dx.doi.org/10.1016/j.eswa.2007.01.003 db/journals/eswa/eswa34.html#BelmontePT08