Dan Gusfield Richard M. Karp Lusheng Wang Paul Stelling Graph Traversals, Genes and Matroids: An Efficient Case of the Travelling Salesman Problem. 167-180 1998 88 Discrete Applied Mathematics 1-3 http://dx.doi.org/10.1016/S0166-218X(98)00071-7 db/journals/dam/dam88.html#GusfieldKWS98