Singularities of nets of quadrics
Compositio Mathematica, Volume 42 (1980) no. 2, pp. 187-212.
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     author = {Wall, C. T. C.},
     title = {Singularities of nets of quadrics},
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     pages = {187--212},
     publisher = {Sijthoff et Noordhoff International Publishers},
     volume = {42},
     number = {2},
     year = {1980},
     mrnumber = {596875},
     zbl = {0423.14002},
     language = {en},
     url = {http://www.numdam.org/item/CM_1980__42_2_187_0/}
}
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Wall, C. T. C. Singularities of nets of quadrics. Compositio Mathematica, Volume 42 (1980) no. 2, pp. 187-212. http://www.numdam.org/item/CM_1980__42_2_187_0/

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