no. 3
A homological characterization of local complete intersections
Compositio Mathematica, Tome 23 (1971) no. 3, pp. 251-255. 
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     title = {A homological characterization of local complete intersections},
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     pages = {251--255},
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     volume = {23},
     number = {3},
     year = {1971},
     mrnumber = {301008},
     zbl = {0218.13028},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1971__23_3_251_0/}
}
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Gulliksen, T. H. A homological characterization of local complete intersections. Compositio Mathematica, Tome 23 (1971) no. 3, pp. 251-255. http://archive.numdam.org/item/CM_1971__23_3_251_0/

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