@article{TMF_1971_6_2_a10,
     author = {K. Valasek},
     title = {Theory of~libron excitations in~solid orthohydrogen {in~the~Bose} approximation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {257--264},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_6_2_a10/}
}