@article{10_4153_CJM_1984_009_3,
     author = {Edge, W. L.},
     title = {Tangent {Spaces} of a {Normal} {Surface} with {Hyperelliptic} {Sections}},
     journal = {Canadian journal of mathematics},
     pages = {131--143},
     year = {1984},
     volume = {36},
     number = {1},
     doi = {10.4153/CJM-1984-009-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1984-009-3/}
}