Literature cited
A. I. Mal'tsev, Algebraic Systems [in Russian], Nauka, Moscow (1970).
P. Cohn, Universal Algebra, Harper and Row, New York (1965).
D. M. Smirnov, "Lattices of varieties and free algebras," Sibirsk. Matem. Zh.,10, No. 5, 1144–1160 (1969).
A. A. Akataev, "On varietiesH m,π ," Algebra i Logika,9, No. 2, 127–136 (1970).
Additional information
Translated from Algebra i Logika, Vol. 10, No. 2, pp. 125–134, March–April, 1971.
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Akataev, A.A. Axiomatic rank of the varietyα π−iπ . Algebr Logic 10, 77–83 (1971). https://doi.org/10.1007/BF02219974
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DOI: https://doi.org/10.1007/BF02219974