no. 1
The hyperosculating points of surfaces in ℙ 3
Compositio Mathematica, Tome 70 (1989) no. 1, pp. 27-49 
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     number = {1},
     mrnumber = {993172},
     zbl = {0698.14062},
     language = {en},
     url = {https://www.numdam.org/item/CM_1989__70_1_27_0/}
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Mingwei, Xu. The hyperosculating points of surfaces in $\mathbb {P}^3$. Compositio Mathematica, Tome 70 (1989) no. 1, pp. 27-49. https://www.numdam.org/item/CM_1989__70_1_27_0/

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