@article{DAN_1970_192_5_a20,
     author = {V. T. Ushakovskii and L. N. Chernyi and P. I. Nikitichev},
     title = {On the growth of hexagonal prism faces in quartz crystals},
     journal = {Doklady Akademii Nauk},
     pages = {1040--1042},
     publisher = {mathdoc},
     volume = {192},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_192_5_a20/}
}