@article{DAN_1979_249_6_a17,
     author = {N. N. Sirota and N. A. Kofman},
     title = {Polymorphous $\alpha${\textendash}$\beta$-transformations of boron nitride},
     journal = {Doklady Akademii Nauk},
     pages = {1346--1348},
     year = {1979},
     volume = {249},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_249_6_a17/}
}