Płonka, Jerzy Some remarks on sums of direct systems of algebras. (English) Zbl 0187.28703 Fundam. Math. 62, 301-308 (1968). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 7 Documents Keywords:general algebraic structures PDFBibTeX XMLCite \textit{J. Płonka}, Fundam. Math. 62, 301--308 (1968; Zbl 0187.28703) Full Text: DOI EuDML