@article{DAN_1989_308_6_a14,
     author = {G. N. Petrova},
     title = {A hierarchy of characteristic times in geomagnetic field variations},
     journal = {Doklady Akademii Nauk},
     pages = {1346--1350},
     publisher = {mathdoc},
     volume = {308},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_6_a14/}
}