@article{AA_2022_34_3_a12,
     author = {V. I. Vasyunin},
     title = {Chapter 7. {Angles} between invariant subspaces},
     journal = {Algebra i analiz},
     pages = {276--295},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AA_2022_34_3_a12/}
}