@article{DAN_1980_253_5_a23,
     author = {I. I. Plyusnina},
     title = {Modification transformations and the crystallinity of quartz and chalcedony},
     journal = {Doklady Akademii Nauk},
     pages = {1126--1129},
     publisher = {mathdoc},
     volume = {253},
     number = {5},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_253_5_a23/}
}