@article{DAN_1960_131_4_a29,
     author = {V. I. Kuznetsov and P. D. Titov},
     title = {Coextraction of tungsten and some other elements},
     journal = {Doklady Akademii Nauk},
     pages = {840--842},
     publisher = {mathdoc},
     volume = {131},
     number = {4},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_4_a29/}
}