no. 2
On the conversion of binary algebras into semi-primal algebras
Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 25 (1971) no. 2, pp. 249-267 
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     title = {On the conversion of binary algebras into semi-primal algebras},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {249--267},
     year = {1971},
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     volume = {Ser. 3, 25},
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     zbl = {0221.08008},
     language = {en},
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Samuelson, D. James. On the conversion of binary algebras into semi-primal algebras. Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 25 (1971) no. 2, pp. 249-267. https://www.numdam.org/item/ASNSP_1971_3_25_2_249_0/

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