@article{FAA_1991_25_1_a16,
     author = {\`E. L. Pekarev},
     title = {Angular operators of nondegenerate subspaces},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {86--88},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1991_25_1_a16/}
}