@article{DAN_1978_238_3_a12,
     author = {Ya. N. Istomin and O. A. Pokhotelov},
     title = {Nonlinear effects in low-frequency geomagnetic fluctuations},
     journal = {Doklady Akademii Nauk},
     pages = {555--557},
     publisher = {mathdoc},
     volume = {238},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_238_3_a12/}
}