@article{DAN_1971_198_1_a11,
     author = {P. S. Soltan and K. F. Prisakaru},
     title = {The {Steiner} problem on graphs},
     journal = {Doklady Akademii Nauk},
     pages = {46--49},
     publisher = {mathdoc},
     volume = {198},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_1_a11/}
}