@article{DE_2000_36_6_a1,
     author = {A. V. Konashenko},
     title = {A criterion for the bessel property of systems of the form $\{\exp(i\lambda_nt)\sin(\mu_nt)\}$ and $\{\exp(i\lambda_nt)\cos(\mu_nt)\}$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {731--735},
     publisher = {mathdoc},
     volume = {36},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_6_a1/}
}