@article{10_4064_am_19_1_117_123,
     author = {F. K\"orner},
     title = {On the degree of asymmetry in the travelling salesman problem},
     journal = {Applicationes Mathematicae},
     pages = {117--123},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1987},
     doi = {10.4064/am-19-1-117-123},
     zbl = {0637.90096},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-19-1-117-123/}
}