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Algebra: Rings, Modules and Categories I. Springer-Verlag, Berlin - Heidelberg - New York, 1973.
MR 0366960 |
Zbl 0266.16001
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Universal Algebra. 2 nd edition, Springer-Verlag, New York - Heidelberg - Berlin, 1979.
MR 0538623
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Geometrical methods in congruence modular algebras. preprint, Darmstadt, 1981.
MR 0714648
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