@article{AA_2012_24_5_a7,
     author = {A. V. Strelets and I. S. Feshchenko},
     title = {Systems of subspaces in {Hilbert} space that obey certain conditions, on their pairwise angles},
     journal = {Algebra i analiz},
     pages = {181--214},
     publisher = {mathdoc},
     volume = {24},
     number = {5},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2012_24_5_a7/}
}