Fascicolo 68/1993 G. Laporte, Recent algorithmic developments for the Traveling salesman problem and the Vehicle Routing problem A.K. Bit, M.P. Biswal, S.S. Alam, Unbalanced transportation problem with multiple fuzzy goals C. De Francesco, Il metodo dell'Eliosside Zhijian Huang, A class of ABC methods for Nonlinear Least Squares problems