@article{DAN_1974_218_2_a4,
     author = {M. A. Iordanskii},
     title = {Minimal numberings of the vertices of trees},
     journal = {Doklady Akademii Nauk},
     pages = {272--275},
     publisher = {mathdoc},
     volume = {218},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_218_2_a4/}
}