@article{10_4153_CJM_1971_067_4,
     author = {Nielsen, Ole A.},
     title = {The {Asymptotic} {Ratio} {Set} and {Direct} {Integral} {Decompositions} of a {Von} {Neumann} {Algebra}},
     journal = {Canadian journal of mathematics},
     pages = {598--607},
     year = {1971},
     volume = {23},
     number = {4},
     doi = {10.4153/CJM-1971-067-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-067-4/}
}