//-->
On the symmetric travelling salesman problem I. : inequalities
Grötschel, Martin, (1977)
On the symmetric travelling salesman problem II. : lifting theorems and facets
On the symmetric travelling salesman problem : solution of a 120-city problem
The perfectly matchable subgraph polytope of a bipartite graph
Balas, Egon, (1981)
On proximity to paths and cycles in 3-connected graphs
Plummer, Mike D., (1981)
On splitable sets
Pulleyblank, William R., (1992)