@article{FAA_1976_10_1_a9,
     author = {Yu. L. Shmul'yan},
     title = {The theory of linear relations and spaces with an indefinite metric},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {67--72},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1976_10_1_a9/}
}