@article{GDZPPN002107538,
title = {Classification of subfactors: the reduction to commuting squares.},
journal = {Inventiones mathematicae},
volume = {100},
year = {1990},
pages = {19-44},
zbl = {0757.46054},
url = {http://dml.mathdoc.fr/item/GDZPPN002107538}
}
Popa, S. Classification of subfactors: the reduction to commuting squares.. Inventiones mathematicae, Tome 100 (1990) pp. 19-44. http://gdmltest.u-ga.fr/item/GDZPPN002107538/