Geodesic
Varieties of algebras with equationally definable zeros
Czechoslovak Mathematical Journal, Tome 27 (1977) no. 3, pp. 394-414

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MR Zbl
DOI : 10.21136/CMJ.1977.101477
Classification : 08A15 
Ježek, Jaroslav. Varieties of algebras with equationally definable zeros. Czechoslovak Mathematical Journal, Tome 27 (1977) no. 3, pp. 394-414. doi: 10.21136/CMJ.1977.101477
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     zbl = {0383.08007},
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