@article{DAN_1957_114_2_a31,
     author = {B. I. Losev and I. E. El'piner and A. N. Melnikova},
     title = {On the halogen treatment of coals under the action of ultrasonic waves},
     journal = {Doklady Akademii Nauk},
     pages = {372--374},
     publisher = {mathdoc},
     volume = {114},
     number = {2},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_2_a31/}
}