@article{10_1090_S0894_0347_1992_1142260_1,
     author = {R\u{a}dulescu, Florin},
     title = {The fundamental group of the von {Neumann} algebra of a free group with infinitely many generators is {\ensuremath{\mathbb{R}}₊\slash{0}}},
     journal = {Journal of the American Mathematical Society},
     pages = {517--532},
     year = {1992},
     volume = {05},
     number = {3},
     doi = {10.1090/S0894-0347-1992-1142260-1},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1992-1142260-1/}
}