no. 3
Normal cones and sheaves of relative jets
Compositio Mathematica, Tome 28 (1974) no. 3, pp. 305-331. 
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     number = {3},
     year = {1974},
     mrnumber = {379897},
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     url = {http://archive.numdam.org/item/CM_1974__28_3_305_0/}
}
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Lejeune-Jalabert, M.; Teissier, B. Normal cones and sheaves of relative jets. Compositio Mathematica, Tome 28 (1974) no. 3, pp. 305-331. http://archive.numdam.org/item/CM_1974__28_3_305_0/

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