@article{DAN_1984_274_1_a19,
     author = {E. V. Sokolova and N. A. Yamnova and Yu. K. Egorov-Tismenko and A. P. Khomyakov},
     title = {Crystal structure of a new phosphate --  $\mathrm{Na}$, $\mathrm{Ca}$ and 
},
     journal = {Doklady Akademii Nauk},
     pages = {78--83},
     publisher = {mathdoc},
     volume = {274},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_274_1_a19/}
}