@article{VUU_2021_31_3_a9,
     author = {A. G. Chentsov and P. A. Chentsov},
     title = {On sequential traversal of sets},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {487--504},
     year = {2021},
     volume = {31},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2021_31_3_a9/}
}