@article{DAN_1961_136_1_a15,
     author = {V. M. Vinokurov and M. M. Zaripov},
     title = {On the blue colour of apatites},
     journal = {Doklady Akademii Nauk},
     pages = {61--62},
     publisher = {mathdoc},
     volume = {136},
     number = {1},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_136_1_a15/}
}