@article{YJOR_1992_2_2_a2,
     author = {Drago\v{s} Cvetkovi\'c and Vladimir Dimitrijevic and Milan Milosavljevic},
     title = {A {Survey} of some {Non-Standard} {Traveling} {Salesman} {Problems}},
     journal = {Yugoslav journal of operations research},
     pages = {163 },
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_1992_2_2_a2/}
}