@article{VUU_2011_1_a6,
     author = {E. E. Ivanko},
     title = {Criterion of the stability of optimal route in the travelling salesman problem in case of a~single vertex addition},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {58--66},
     publisher = {mathdoc},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2011_1_a6/}
}