@article{DAN_1989_308_1_a15,
     author = {A. L. Groshkov and R. R. Kalimulin and G. M. Shalashov},
     title = {Cubic nonlinear seismic effect},
     journal = {Doklady Akademii Nauk},
     pages = {65--67},
     publisher = {mathdoc},
     volume = {308},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_1_a15/}
}