TY - JOUR A1 - Grötschel, Martin A1 - Pulleyblank, William T1 - Clique tree inequalities and the symmetric travelling salesman problem T2 - Mathematics of Operations Research Y1 - 1986 UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/3052 VL - 11 IS - 4 SP - 537 EP - 569 ER -