Grätzer, George [Jonsson, Bjarni; Taylor, Walter; Wenzel, Günter H.; Lampe, W. A.; Quackenbush, Robert W.] Universal algebra. 2nd printing of the 2nd ed. 1979. (English) Zbl 1143.08001 New York, NY: Springer (ISBN 978-0-387-77486-2). xviii, 581 p. (2008). MSC: 08-02 08Axx 08Bxx 08Cxx 03E35 PDFBibTeX XMLCite \textit{G. Grätzer}, Universal algebra. 2nd printing of the 2nd ed. 1979. New York, NY: Springer (2008; Zbl 1143.08001)
Grätzer, George [Jonsson, Bjarni; Taylor, Walter; Wenzel, Günter H.; Lampe, W. A.; Quackenbush, Robert W.] Universal algebra. 2nd ed. (English) Zbl 0412.08001 New York, Heidelberg, Berlin: Springer-Verlag. XVIII, 581 p. DM 45.00 (1979). MSC: 08-02 08Axx 08Bxx 08Cxx 03E35 PDFBibTeX XML
Grätzer, G.; Lampe, W. A. On subalgebra lattices of universal algebras. (English) Zbl 0178.01101 J. Algebra 7, 263-270 (1967). PDFBibTeX XMLCite \textit{G. Grätzer} and \textit{W. A. Lampe}, J. Algebra 7, 263--270 (1967; Zbl 0178.01101) Full Text: DOI