@article{10_4153_CMB_2015_081_8,
     author = {Ino, Shoji},
     title = {Perturbations of {Von} {Neumann} {Subalgebras} {With} {Finite} {Index}},
     journal = {Canadian mathematical bulletin},
     pages = {320--325},
     year = {2016},
     volume = {59},
     number = {2},
     doi = {10.4153/CMB-2015-081-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2015-081-8/}
}