no. 3
A divisorial cycle acquiring an embedded component under a flat specialization
Compositio Mathematica, Tome 30 (1975) no. 3, pp. 221-233. 
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     number = {3},
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     mrnumber = {382270},
     zbl = {0319.14001},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1975__30_3_221_0/}
}
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Altman, Allen B.; Kleiman, Steven L. A divisorial cycle acquiring an embedded component under a flat specialization. Compositio Mathematica, Tome 30 (1975) no. 3, pp. 221-233. http://archive.numdam.org/item/CM_1975__30_3_221_0/

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