@article{DAN_1965_161_1_a20,
     author = {B. I. Birman and B. L. Timan},
     title = {An analysis of conditions for the appearance of varied distribution of impurities in crystals in the case of directional crystallization},
     journal = {Doklady Akademii Nauk},
     pages = {78--80},
     publisher = {mathdoc},
     volume = {161},
     number = {1},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_161_1_a20/}
}