@article{SM_1968_5_1_a6,
     author = {I. S. Kac},
     title = {A remark on the article {``The} existence of spectral functions of generalized second order  ifferential systems with boundary conditions at the singular end''},
     journal = {Sbornik. Mathematics},
     pages = {141--145},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_5_1_a6/}
}