@article{DAN_1957_112_3_a25,
     author = {N. A. Toropov and B. V. Volkonskii and V. I. Sadkov},
     title = {On the polymorphism of bicalcium silicate},
     journal = {Doklady Akademii Nauk},
     pages = {467--469},
     publisher = {mathdoc},
     volume = {112},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_112_3_a25/}
}