@article{DAN_1995_344_2_a15,
     author = {V. A. Shapiro and A. A. Akhmetzyanova and N. V. Fedorova},
     title = {Secular variation of the geomagnetic field in the course of 21 and 22 solar activity maxima},
     journal = {Doklady Akademii Nauk},
     pages = {243--246},
     publisher = {mathdoc},
     volume = {344},
     number = {2},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_344_2_a15/}
}