1990

T.H.C. Smith, T.W.S. Meyer, "Lower bounds for the symmetric travelling salesman problem from lagrangean relaxations", Discrete Applied Mathematics 26, 209-217.
T. Volgenant and R. Jonker, "Fictitious upper bounds in an algorithm for the symmetric traveling salesman problem", Computers and Operations Research 17, 113-117.
M. Padberg and G. Rinaldi, "An efficient algorithm for the minimum capacity cut problem", Mathematical Programming 47, 19-36.
M. Padberg and G. Rinaldi, "Facet identification for the symmetric traveling salesman polytope", Mathematical Programming 47, 219-257.

1991

M. Grötschel and O. Holland, "Solution of large-scale symmetric travelling salesman problems", Mathematical Programming 51, 141-202.
M. Padberg and G. Rinaldi, "A branch-and-cut algorithm for the resolution of large-scale symmetric traveling salesman problems", SIAM Review 33, 60-100.

1992

S. Tschöke, M. Räcke, R. Lüling, and B. Monien, "Solving the traveling salesman problem with a parallel branch-and-bound algorithm on a 1024 processor network", Technical Report, Department of Mathematics and Computer Science, University of Paderborn, Germany, 1992.

1993

J.-M. Clochard and D. Naddef, "Using path inequalities in a branch and cut code for the symmetric traveling salesman problem", in Third IPCO Conference, (G. Rinaldi and L. Wolsey, eds),  pp. 291-311.

1994

M. Jünger, S. Thienel, and G. Reinelt, "Provably good solutions for the traveling salesman problem", Zeitschrift für Operations Research 40, 183-217.

1995

D. Applegate, R. Bixby, V. Chvátal, and W. Cook, "Finding cuts in the TSP (A preliminary report)", DIMACS Technical Report 95-05, March.
A detailed description of several separation algorithms for combs and clique trees. These algorithms were used by the authors to solve a series of TSPLIB test instances, including pcb3038, fnl4461, and pla7392. Certificates of the optimality of these three large instances were made available on the internet by the authors.
T. Christof and G. Reinelt, "Parallel cutting plane generation for the TSP - Extended Abstract", Research Report, Interdisziplinäres Zentrum für Wissenschaftliches Rechnen der Universität Heidelberg.
M. Jünger, G. Reinelt, and G. Rinaldi, "The traveling salemsan problem", in: Handbooks in Operations Reseach and Management Science, Volume 7 (M.O. Ball, T. Magnanti, C.L. Monma, and G. Nemhauser, eds), Elsevier Science B.V.,  pp. 225-330.
M. Jünger and P. Stömer, "Solving large-scale traveling salesman problems with parallel branch-and-cut", Report Number 95.191, Institut für Informatik, Universität Köln.
S. Tschöke, R. Lüling, and B. Monien, "Solving the traveling salesman problem with a parallel branch-and-bound algorithm on a 1024 processor network", Technical Report Number 160, Department of Mathematics and Computer Science, University of Paderborn, Germany.