@article{DAN_1991_320_4_a21,
     author = {K. E. Plokhotnikov},
     title = {The possibility of a finite crystal at zero temperature (the},
     journal = {Doklady Akademii Nauk},
     pages = {877--881},
     publisher = {mathdoc},
     volume = {320},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_320_4_a21/}
}