@article{10_4153_CJM_1973_008_7,
     author = {Woods, E. J.},
     title = {The {Classification} of {Factors} is not {Smooth}},
     journal = {Canadian journal of mathematics},
     pages = {96--102},
     year = {1973},
     volume = {25},
     number = {1},
     doi = {10.4153/CJM-1973-008-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-008-7/}
}