@article{SM_1992_71_2_a5,
     author = {A. L. Sakhnovich},
     title = {Spectral functions of a~canonical system of order~$2n$},
     journal = {Sbornik. Mathematics},
     pages = {355--369},
     publisher = {mathdoc},
     volume = {71},
     number = {2},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_71_2_a5/}
}