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@article{MZ_1966__92_170534, author = {Alfred L. Foster and Alden Pixley}, title = {Algebraic and {Equational} {Semi-Maximality;} {Equational} {Spectra:} {I.}}, journal = {Mathematische Zeitschrift}, pages = {30--50}, publisher = {mathdoc}, volume = {92}, year = {1966}, zbl = {0136.26101}, url = {http://geodesic.mathdoc.fr/item/MZ_1966__92_170534/} }
Alfred L. Foster; Alden Pixley. Algebraic and Equational Semi-Maximality; Equational Spectra: I.. Mathematische Zeitschrift, Tome 92 (1966), pp. 30-50. http://geodesic.mathdoc.fr/item/MZ_1966__92_170534/