@misc{10_4153_CMB_1974_114_x,
     title = {The {Degrees} of {Radical} {Extensions}},
     journal = {Canadian mathematical bulletin},
     pages = {615--617},
     year = {1974},
     volume = {17},
     number = {4},
     doi = {10.4153/CMB-1974-114-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-114-x/}
}