@article{DAN_1964_159_2_a28,
     author = {A. V. Nikolaev and A. A. Kolesnikov and T. P. Smirnova},
     title = {The extraction system of $\mathrm{La}(\mathrm{NO_3})_3$ -- $\mathrm{NH}_4\mathrm{NO}_3$ 
},
     journal = {Doklady Akademii Nauk},
     pages = {379--382},
     publisher = {mathdoc},
     volume = {159},
     number = {2},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_159_2_a28/}
}