The discriminant of a real simple singularity
Compositio Mathematica, Volume 37 (1978) no. 1, pp. 51-62.
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     title = {The discriminant of a real simple singularity},
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     pages = {51--62},
     publisher = {Sijthoff et Noordhoff International Publishers},
     volume = {37},
     number = {1},
     year = {1978},
     mrnumber = {501918},
     zbl = {0407.14001},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1978__37_1_51_0/}
}
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Looijenga, Eduard. The discriminant of a real simple singularity. Compositio Mathematica, Volume 37 (1978) no. 1, pp. 51-62. http://archive.numdam.org/item/CM_1978__37_1_51_0/

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