no. 4
Semiregularity, obstructions and deformations of Hodge classes
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 28 (1999) no. 4, pp. 809-820 
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     author = {Ran, Ziv},
     title = {Semiregularity, obstructions and deformations of {Hodge} classes},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {809--820},
     year = {1999},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 28},
     number = {4},
     mrnumber = {1760539},
     zbl = {0980.14007},
     language = {en},
     url = {https://www.numdam.org/item/ASNSP_1999_4_28_4_809_0/}
}
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Ran, Ziv. Semiregularity, obstructions and deformations of Hodge classes. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 28 (1999) no. 4, pp. 809-820. https://www.numdam.org/item/ASNSP_1999_4_28_4_809_0/

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