1. P.M. Camerini, L. Fratta and F. Maffioli, “A heuristically guided algorithm for the traveling salesman problem,” Journal of the Institution of Computer Science 4 (1973) 31–35.
2. P. M. Camerini and F. Maffioli, “Bounds for 3-matroid intersection problems,” Information Processing Letters 3 (1975) 81–83.
3. P.M. Camerini, L. Fratta and F. Maffioli, “Traveling salesman problem: heuristically guided search and modified gradient techniques,” to appear.
4. G.A. Croes, “A method for solving traveling salesman problems,” Operations Research 6 (1958) 791–812.
5. H. Crowder, “Computational improvements for subgradient optimization”, IBM Research Rept. RC 4907 (No. 21841) Thomas J. Watson Research Center (June 1974).