@article{FAA_1983_17_4_a13,
     author = {I. S. Kats},
     title = {Linear relations generated by canonical differential equations},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {86--87},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1983_17_4_a13/}
}