@article{FPM_2018_22_2_a3,
     author = {V. M. Budanov},
     title = {Undefined frequencies method},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {59--71},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2018_22_2_a3/}
}