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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     zbl = {0319.14001},
     language = {en},
     url = {http://www.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://www.numdam.org/item/CM_1975__30_3_221_0/

[1] A. Altman and S. Kleiman: Algebraic systems of linearly equivalent divisor-like subschemes. Compositio Math., vol. 29 (1974) 113-139. | EuDML | Numdam | MR | Zbl

[2] A. Altman and S. Kleiman: Introduction to Grothendieck Duality Theory. Lecture Notes in Math., Vol. 146, Springer-Verlag (1970) (cited GD). | MR | Zbl

[3] A. Altman and S. Kleiman: Joins of schemes, linear projections (to appear). | Numdam | MR | Zbl

[4] A. Grothendieck and J. Dieudonné: Eléments de Géométrie Algébrique. Publ. Math. No. 8, 11, 17, 24, 28, 32. IHES, (1961, 1961, 1963, 1965, 1966, 1967) (cited EGA II, III1 or 0III, III2, IV2, IV3, IV4). | Numdam

[5] R. Godement: Topologie Algébrique et Théorie des Faisceaux. Hermann, Paris (1958). | MR | Zbl

[6] D. Mumford: Lectures on Curves on an Algebraic Surface. Annals of Math. Studies, No. 59, Princeton University Press (1966). | MR | Zbl