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References
E.Graczyńska and F.Pastijn,A generalization of Płonka sums, submitted for Fund. Math.
E. Graczyńska,On the sum of double systems of some algebras I, Bull. Acad. Pol. Sci. vol. XXIII, nr.5 (1975), 509–513.
G. Grätzer,Universal Algebra, Springer Verlag, Berlin (1979).
R. John,On classes of algebras definable by regular equations, Coll. Math.,36 (1976), 17–21.
H. Lakser, R. Padmanabhan andC. R. Platt,Subdirect decomposition of Płonka sums, Duke Math. J.39 (1972), 485–488.
A. Mitschke,On a representation of groupoids as sums of dorect systems, Coll. Math.,28 (1973), 11–18.
J. Płonka,On a method of construction of abstract algebras, Fund. Math.61 (1967), 183–189.
J. Płonka,On equational classes of abstract algebras defined by regular equations, Fund. Math. LXIV (1969), 241–247.
J. Płonka,On sums of direct systems of Boolean algebras, Coll. Math.20 (1969), 209–214.
J.Schmidt,Quasi-decompositions, exact sequences and triple sums of semigroups I. General theory.
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Dedicated to the 80-th birthday of Alfred Tarski
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Płonka, J. On the sum of a direct system of universal algebras with nullary polynomials. Algebra Universalis 19, 197–207 (1984). https://doi.org/10.1007/BF01190429
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DOI: https://doi.org/10.1007/BF01190429