Fascicolo 88/1998 Alfredo Fiocco, Bruno Simeone, Domenico Tersigni, A Sunday Opening Calendar for Shops in Rome through Random Utility Matching and Travelling Salesman Models Carlo Filippi, Giovanni Andreatta, Giorgio Romanin-Jacur, On Balancing the Flow Out of a Network with Gains Janez Zerovnik, Janez Brest, An Approximation Algorithm for the Asymmetric Traveling Salesman Problem