@article{DAN_1972_202_2_a11,
     author = {P. S. Soltan},
     title = {Simultaneous solution of several {Steiner} problems on a graph},
     journal = {Doklady Akademii Nauk},
     pages = {294--297},
     publisher = {mathdoc},
     volume = {202},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_202_2_a11/}
}