@article{10_4153_CJM_1975_104_6,
     author = {Kalmanson, Kenneth},
     title = {Edgeconvex {Circuits} and the {Traveling} {Salesman} {Problem}},
     journal = {Canadian journal of mathematics},
     pages = {1000--1010},
     year = {1975},
     volume = {27},
     number = {5},
     doi = {10.4153/CJM-1975-104-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-104-6/}
}