@article{DAN_1975_220_5_a16,
     author = {V. M. Sergeev and M. E. Ramenskaya},
     title = {On yellow {Iceland} spar crystals blackening during the annealing},
     journal = {Doklady Akademii Nauk},
     pages = {1077--1079},
     publisher = {mathdoc},
     volume = {220},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_220_5_a16/}
}