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},
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     number = {2},
     year = {1971},
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     zbl = {0221.08008},
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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. http://archive.numdam.org/item/ASNSP_1971_3_25_2_249_0/

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