@article{DAN_1980_250_2_a18,
     author = {A. A. Nikonov},
     title = {Determination of magnetudes and recurrence of strong earthquakes of the past
},
     journal = {Doklady Akademii Nauk},
     pages = {336--339},
     publisher = {mathdoc},
     volume = {250},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_2_a18/}
}