@article{DE_1997_33_1_a2,
     author = {E. V. Aleksandrova},
     title = {A trace formula for an equation of the oscillations of a rectilinear pipeline},
     journal = {Differencialʹnye uravneni\^a},
     pages = {12--18},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_1_a2/}
}